Conveners
Poster - 1: D1
- Vishal Bhardwaj (IISER Mohali)
- Ambresh Shivaji (IISER Mohali)
- Satyajit Jena (IISER Mohali)
The study of photodisintegration of $^7Li$ is of importance to Nuclear Physics, Particle Physics and Astrophysics. Primordial abundances of light elements such as $D$, $^3He$, $^4He$ and $^7Li$ are predicted by Big Bang theory of early universe and is of great interest to cosmologists. Lithium, being fragile gets destroyed easily at relatively low temperatures. WMAP measurements have...
In recent years, cosmological experiments like PLANCK-2018 [1,2] and BICEP/KECK [3] have shown the efficacy of single field slow-roll inflaton potential in explaining various experimental parameters regarding LSS, CMBR anisotropy and polarization data with significant precession. Therefore, obtaining a low energy effective inflationary theory consistent with such a class of potentials from...
The W ± and Z-boson production is extensively studied at hadron colliders since it represents an important benchmark of the Standard Model (SM). In LHC energies, the measurements of W ± and Z-boson in p-p collisions had been done at √s = 8 and 13 TeV. The Electroweak theory and Quantum Chromodynamics (QCD) calculations at Next-to-Leading Order (NLO) and Next-to-Next-to-Leading Order (NNLO) in...
The quark-hadron transition that happens in heavy ion collisions is likely influenced by the effects of rotation and magnetic field, both present due to the geometry of a generic non-head-on impact. The simultaneous imposition of these two phenomenological parameters would lead to a modification of the conventional phase diagram for QCD matter. We explore the deconfinement transition between...
Any grand unified model is plagued with particles capable of inducing
proton decay. Identifying all potential scalar proton decay mediators
stemming from different irreducible representations of SO(10), we
will show their coupling with the Standard Model fermions, tree-level
contributions of the effective strength of $B-L$ conserving ($d=6$),
and $B-L$ violating ($d=7$) operators to...
Feynman integrals at any order of perturbation satisfy the Gelfand-Kapranov-Zelevinsky (GKZ) system of partial differential equations. In an ongoing collaboration, we present the automation of two techniques, namely the Groebner deformation method and the method of triangulations of point configurations, to solve such equations arising in the context of Feynman integrals, in the form of...
We investigate two-body nonleptonic weak decays of bottom meson involving heavy to heavy meson transitions into pseudoscalar and axial-vector mesons. The form factors, decay amplitudes, and branching ratios of CKM-favoured and suppressed modes are calculated in the relativistic and non-relativistic framework within the factorization hypothesis. We find that the branching ratios of several...
We present a background model for TEXONO experiment that is situated in the Kuo-Sheng Neutrino Laboratory under 50-ton passive shielding house. The model includes background contributions from both internal and external contaminations. We adopt the Geant4-based simulation framework to develop the background model, taking into account all contributions from nine radioactive nuclides: 40 K, 208...
The mass spectra of bottomonium $b\bar{b}$, is calculated using Cornell potential in a non-relativistic framework, with spin dependent corrections corresponding to the spin-orbit, spin-spin and tensor interactions added perturbatively. The radial and orbital Regge trajectories are also studied for the same. Further, we estimated the wave function at the origin to predict the decay widths of...
Quantum gravity has been studied using various approaches, and all of these approaches introduce a fundamental length scale in the theory. Non-Commutative space-time is an approach which incorporates this fundamental minimum length scale naturally. Though length scale at which Casimir effect is measured and the scale at which quantum gravity effects are expected are very different, it is...
In the work reported in this paper, we have analyzed generalized Chaplygin gas (GCG) and modified generalized Chaplygin gas (MGCG) in an interacting scenario. The equation of state parameter has been analyzed in both the cases and the stability of the models has been discerned through squared speed of sound. Stability against gravitational perturbations has been observed for both GCG and MGCG...
Jet substructure modification due to different aspects of jet quenching is studied using jet shape and jet fragmentation observables. The jet shape contains information about the transverse energy distribution inside a jet and the jet fragmentation function describes the longitudinal momentum distribution of hadrons inside a reconstructed jet. These measurements provide insight into the jet...
We use an anti-de Sitter/Quantum Chromodynamics (AdS/QCD) based holographic light-front wavefunction for the $J/\psi$ meson, in conjunction with the Color dipole model cross-section to investigate the cross-sections data for exclusive $J/\psi$ electroproduction. We used the dipole model parameters fitted to the most recent 2015 high precision HERA data on inclusive Deep Inelastic Scattering...
In the context of the formation of quark gluon plasma, whether the anisotropic flow in small collision system has the same underlying origin as that of the heavy-ions continues to be a matter of debate. Although the measurements of two and multi-particle correlations apparently suggest that azimuthal anisotropy in small systems is a consequence of collective excitation driven by the initial...
In the light of various CMB missions, the potential offered by AdS swampland conjectures is investigated. Recent CMB observations bound the sixth-order self-coupling of the inflaton field in the AdS swampland conjectures. Current observations can not rule out the inflaton field arising from AdS swampland conjectures.
The experimental measurements of the LFU ratios $R_{D^{(*)}}$, $R_{K^{(*)}}$ and $R_{J/\psi}$ strongly hint the presence of new physics beyond the standard model in $b\rightarrow c\ell\nu_\ell$ and $b\rightarrow s\ell\ell$ transitions, as these values show a tension of about $(2-3)\sigma$ from their standard model predictions. In this work, we investigate the possible manifestation of new...
Minimal $U(1)_{L_\mu-L_\tau}$ extended Standard Model (SM) is well motivated and incorporates the discrepancy between the theoretical prediction and experimental observation of muon anomalous magnetic moment. We study the possibility of identifying the Beyond Standard Model (BSM) Higgs of $U(1)_{L_\mu-L_\tau}$ sector (otherwise required to break the additional symmetry) as the inflaton in the...
In this work we have reported a study on the viscous generalized Chaplygin gas (GCG) in the presence of bulk viscosity and interacting scenario. Reconstruction schemes have been manifested in Einstein and modified $f(T)$ gravity framework. Non-viscous cases have also been taken into account. The equation of state (EoS) parameter has been studied under the various circumstances and the...
A Cosmic Muon Veto Detector (CMVD) is being built around the existing RPC-based Mini-Iron Calorimeter (Mini-ICAL) to study the feasibility of a shallow depth neutrino experiment. The CMVD uses 4.5 m long extruded plastic scintillator strips. A Di-Counter made up of two extruded scintillator strips, is the basic building block of the CMVD. Two fibers embedded along the length of the strips are...
Gas Electron Multiplier (GEM) detectors have been used in various applications because of their outstanding spatial and time resolutions, high-rate handling capabilities, and design flexibility. GEM detectors are a potential instrument for nuclear and particle physics studies. The GEM detector operates in an environmentally friendly and sustainable gas combinations. The purity and quality of...
The problem of late-time cosmic acceleration is one of the critical issues in the scientific community. Various theoretical models that predict the acceleration in the late time phase have been presented. Out of these models, the non-canonical scalar field models have gained lots of popularity in recent years. The tachyon field model is one of these models that has been studied in detail by...
Despite the discovery of the Higgs boson, the Higgs sector of the standard model is still not fully established. In particular, the self couplings of the Higgs boson, and its couplings with gauge bosons, are still to be fully determined. We consider electroweak corrections to the process $H\rightarrow ZZ\rightarrow 4l$. The corrections depend on the $HHH$ and $ZZHH$ couplings. We investigate...
The signature of noncommutativity on various measures of entanglement has been observed by considering the holographic dual of noncommutative super Yang-Mills theory. We have followed a systematic analytical approach in order to compute the holographic entanglement entropy corresponding to a strip-like subsystem of length l. The relationship between the subsystem size (in dimensionless form)...
Emission properties of the Astrophysical objects such as Neutron Stars are found using mass, pressure profile and thermal cooling rate. In this current work, we determine the cooling rate of spherically symmetric neutron star as a function of time and distance from the star's centre using NSCool code. Here we first find the mass, pressure and baryon number density profile of the non-rotating...
Energy dependence of information entropy is examined using the multiplicity distributions(MDs) of produced charged particles in pp collisions at ISR, SPS and LHC energies. The findings reveal that MDs at these energies exhibit a new type of scaling if the variable involved is the 'Information entropy' of the distribution, $S = -\Sigma Pn ln Pn$. Similar entropy scaling has also been observed...
We present a new methodology to perform the epsilon-expansion of hypergeometric functions with linear epsilon-dependent Pochhammer parameters in any number of variables. Our approach allows one to perform Taylor as well as Laurent series expansion of multivariable hypergeometric functions. Each of the coefficients of epsilon in the series expansion is expressed as a linear combination of...
The concept of dark energy has been proposed to explain the observed accelerated expansion of the universe. One popular and trivial choice of source of dark energy is the scalar field. We choose the tachyonic field, one of the scalar fields, as a candidate for dark energy and discuss it in a model where matter and dark energy (tachyonic scalar field) are allowed to interact with each other....
In this work, we have discussed how a multivariate algorithm, namely XGBoost, can deal with the disagreement between data and simulation in any analysis. The goal is to train the model in the control channel and extract scale factors which can be used for event re-weighting in the corresponding signal channel. In $B_{s}\to \phi\mu^{+}\mu^{-}$ analysis, $B_{s}\to J/\psi\phi$ is the...
Straw tubes are drift chambers made of a gas filled conducting cylinder acting as cathode, and a wire stretched along the axis of the cylinder acting as an anode. The Straw Tube Trackers (STTs) are a low mass tracking system with excellent vertex, momentum, angular and time resolution, and particle identification. Straw Tube based tracking detector is proposed for one of the Near Detectors in...
Chiral Magnetic Wave (CMW), induces electric quadrupole moment in quark-gluon plasma produced in heavy-ion collisions, which removes degeneracy between elliptic flow of positively and negatively charged particles [1]. The charge-dependent elliptic flow as a function of the charge asymmetry ($A_{ch}$) serves as an important tool for study of CMW. We performed this study on 13.5 million Au+Au...
The Non-Standard Interactions (NSIs) are subdominant effects due to unknown couplings of neutrinos, often appearing in various extensions of the Standard Model, which may impact the neutrino oscillations through matter. It is important and interesting to explore the impact of NSIs in the ongoing and upcoming promising neutrino oscillations experiments. In this work, we have probed the imprints...
Isolated ideal neutron stars (NS) of age $>10^9$ yrs exhaust thermal and rotational energies and cool down to temperatures below $\mathcal{O}(100)$ K. Accretion of particle dark matter (DM) by such NS can heat them up through kinetic and annihilation processes. This increases the NS surface temperature to a maximum of $\sim 2550$ K in the best case scenario. The maximum accretion rate...
In the vicinity of Planck length scale, only where the quantum gravitational effects are expected to be observed, any attempt towards localization of an event inevitably results in gravitational collapse. To avoid such a scenario one needs to postulate noncommutative algebra between space-time coordinates, which are now promoted to the level of operators. On the other hand, a consistent...
The light sea quark distribution functions $\bar{d}(x)$ and $\bar{u}(x)$ have been calculated explicitly for proton using the chiral constituent quark model which has connotation of chiral symmetry breaking and SU(3) symmetry breaking. In view of the latest SeaQuest data the results have been discussed thoroughly for the light antiquark asymmetries and the Gottfried integral.
Correlation between the various observables, like, multiplicity, sum of event transverse momenta or the net charge of particles produced in pp collisions at LHC energies within intervals separated in pseudorapidity and azimuth angle is regarded as a sensitive tool to investigate the collision dynamics and test the models of hardon production. In the present work forward-backward (FB)...
Within the framework of the symmetric-asymmetric Gaussian barrier distribution (SAGBD) approach, the fusion cross-sections for 12C + 144,154Sm reactions are theoretically analyzed in the energy range lying below to well above the Coulomb barrier. In the SAGBD approach, the multidimensional nature of nuclear interaction potential is included by using a Gaussian type of weight function within...
We revisit the status of asymptotic symmetries in higher even dimensions and propose a definition of superrotation charge beyond linearized gravity. We prove that there is a well-defined spacetime action of the superrotation charge on the space of asymptotically flat geometries. Additionally, we demonstrate that the Ward identity associated with superrotation charges follows from the...
Left-Right symmetric models have been a natural extension to the standard model based on the fact that the standard model is predominantly left-handed. So it is normal to think that the left-right symmetry is restored at high energies. The spontaneous breaking of this left-right symmetry depends on the specific model and the minimal model involves extra Higgs triplets or doublets to give rise...
Existing endcap calorimeters of the CMS experiment cannot cope with the radiation or pileup expected during the high-luminosity operation of the LHC. Their jet energy resolution also needs to be augmented in order to enhance the physics reach of the experiment. At high jet energy, a correct association between the charged particle tracks and the calorimetric clusters is very important,...
The most dominant but experimentally difficult decay channel of the HIggs boson, into a pair of bottom quarks
has already been established using the Higgs boson production associated with a vector boson (VH, V = W or Z),
when V decays leptonically. The relatively more abundant and the second largest Higgs boson production mode,
the vector boson fusion (VBF) process, is suitable to...
In 1988 the European Muon Collaboration (EMC) at CERN shocked the physics community by announcing that the sum of the spins of the three quarks that make up the proton is much less than the spin of the proton itself, later on which is known so-called "proton spin puzzle." Physicists have been unable to answer a seemingly simple question: where does proton spin come from? How the proton’s spin...
In particle physics, the Glashow-Weinberg-Salam (GWS) model of the electroweak (EW) interactions describes the fundamental parameters, i.e, coupling constant ($\alpha_{EM}$), Fermi constant ($G_{F}$), W boson mass ($M_{W}$), Z boson mass ($M_{Z}$) and $\theta_{W}$, referred as the Weak Mixing Angle or the Weinberg Angle. This angle is a fundamental parameter in the Standard model (SM),...
Collectivity is an essential feature of the strongly interacting matter formed in the deconfined phase of quarks and gluons in the collisions of nuclei at relativistic energies. Experimentally such collective behaviour has been observed in heavy ion collisions at RHIC and LHC energies. The other observations, like strangeness enhancement, also support the existence of quark-gluon plasma in...
At collider machines operating at energies much above the electroweak scale, all Standard Model particles will appear essentially massless, including the nominally heavy ones. The kinematic consequences of this can make the signals for the Standard Model, and for other models, very different from the signals at the LHC or other colliders of the past. These differences are explained and some of...
The origin of cosmic ray particles is still largely unknown since they are
deflected on their journey to the Earth by magnetic fields. However, very high
energy (VHE) photons that can be produced by both leptonic and hadronic
processes, are attenuated by extragalactic background light, i.e. they cannot be
probed distances larger than z ∼ 1 at energies above ∼ 1 TeV. In comparison,
only...
With the increasing complexity and growing volume of data taken by the current experiments, the enormous challenge of isolating potential BSM signatures from the known Standard Model(SM) footprints is an active area of research in HEP. Machine learning (ML) algorithms are appropriate for analyzing large amounts of data and can find more intrinsic patterns in multidimensional data. We explored...
We investigate the nature of the complex retarded potential of a heavy quark moving in a hot and dense static quark gluon plasma. The well-known concept of the retarded potential in electrodynamics is extended to the context of the heavy-quark by modifying the static vacuum Cornell potential through Lorentz transformation to the static frame of the medium. The resulting potential in the vacuum...
In this work we calculate the time evolution of local gauge invariant field theoretical model, comprising
of a scalar field coupled to vector gauge field. Assuming a linear relationship between phase angles
α(x) at two closely separated space-time points x and x′ = x − δ, with 0 < δ < 1, we obtain an explicit
dependence of scalar field φ(x) at x and x′ in terms of Wilson-line variable....
Most of the hadronic B decays observed proceed through a "D" meson (D, D$^*$, D$^{**}$) , as b$\rightarrow $c transitions dominate among other b transitions. D$^{**}$ indicates the collection of non-strange charm mesons falling in the mass range of 2.2 - 2.8 GeV/c$^2$.
We present the study of B to charm decays in the Belle experiment with 711 fb$^{-1}$ electron-positron collision data...
The decay D^{0}->K_{s}K_{s} is a singly Cabibbo-suppressed transition that involves the interference between cubar->ssbar and cubar->ddbar amplitudes, mediated by the exchange of a W boson at the tree level, that can generate CP asymmetries at the 1% level, even if the Cabibbo-Kobayashi-Maskawa phase is the only source of CP. Current experimental measurements of the CP asymmetry in...
Detection of delayed sub-TeV photons from Gamma-Ray Bursts (GRBs) by MAGIC and HESS has proved the promising future of GRB afterglow studies with the Cherenkov Telescope Array, the next-generation ground-based gamma-ray astronomy observatory. With the unprecedented sensitivity of CTA, afterglow detection rates are expected to increase dramatically in the coming decade. We embark on exploring...
NO$\nu$A is a long-baseline accelerator neutrino experiment at Fermilab that aims at precision neutrino oscillation analyses and cross-section measurements. Large uncertainties on the absolute neutrino flux affect both of these measurements. Measuring neutrino-electron elastic scattering provides an in-situ constraint on the absolute neutrino flux. In this analysis the signal is a single, very...
Next-to-next-to-leading order (NNLO) QED corrections are an important ingredient for different low-energy experiments such as MUonE, MUSE, and P2. In this talk, we will discuss the computation of such higher-order corrections to different observables relevant to the above experiments. To compute these corrections it is important to keep the masses of leptons finite, which regularises the...
In the current study we are demonstrating a bounce cosmology with generalized holographic cutoffs. The bounce realization arising from the application of holographic principle has been demonstrated with a modified gravity framework. Considering a multiplicative bouncing scale factor we have shown the four types of singularities. For this scale factor we have consider a scenario having...
DUNE (Deep Underground Neutrino Experiment) is a long baseline neutrino oscillation experiment that is currently being built to study the $\nu_{\mu}-\nu_e$ oscillations, which will eventually help in determining the neutrino mass-hierarchy, CP violation in the lepton sector and many other exciting areas of particle physics. A Near Detector (ND) Complex comprising three detectors - ND-GAr,...
Exploration of entanglement entropy and obtaining the Page curve in the context of eternal black holes associated with top-down holographic duals of QCD-like theories at high temperatures and intermediate coupling, has been missing in the literature. In this talk, I will explain how we obtain the Page curve of an eternal black hole relevant to the M-theory dual of thermal QCD-like theories at...
Anjali S and Saurabh Gupta
Department of Physics, National Institute of Technology Calicut,
Kozhikode - 673 601, Kerala, India
E-mail: anjalisujatha28@gmail.com
Abstract: We investigate a system of particle constrained to move on a torus knot via the framework of superfield formalism and derive the off-shell nilpotent and absolutely anti-commuting...
We report various energy reconstruction algorithms used by the CMS hadron calorimeter (HCAL) during the LHC Run-2. The signal pulse of deposited energy in the HCAL subdetector is a function of time, and hence it overlaps with adjacent pulses due to the high pileup scenario and short proton-proton bunch crossing time (25 ns). The correct contribution of the signal pulse can be estimated using...
We consider two BSM scenarios with scalar leptoquarks (LQ), motivated by neutrino mass, muon $g-2$, and anomalies in $B$-decay ratios. A combination of a singlet and a doublet scalar LQ can generate one-loop Majorana neutrino mass, and contribute to the observed muon and electron $g-2$ values, while satisfying bounds from lepton flavour violating decays. A carefully chosen parameter space in...
Neutrino oscillation experiments use nuclear targets to achieve the necessary interaction events to improve statistics. The inevitable nuclear effects arise due to the sophisticated nuclear environment and our poor understanding of the neutrino interaction with the targets gives rise to systematic uncertainties in the determination of neutrino oscillation parameters. In order to precisely...
Following the discovery of the Higgs boson by the ATLAS and CMS experiments at the LHC, began the zeal for measuring its coupling with other Standard Model (SM) particles. The Higgs Yukawa couplings to light quarks (u,d,s) are currently unknown and the study of inclusive decays of the Higgs boson to these states are extremely challenging due to the large multijet background. In this scenario,...
We study the possibility of existence of deconfined quark matter in the core of neutron stars and non-radial oscillation modes in neutron and hybrid stars. A relativistic mean field model is used to describe the nuclear matter at low densities and zero temperature while Nambu--Jona-Lasinio model is used to describe the quark matter at high densities and zero temperature. A Gibbs construct is...
The Time Projection Chamber (TPC) [1] has the capability of three-dimensional particle tracking. We are developing a bulk Micromegas [2] based prototype TPC at SINP. In the present work, we have measured the detector gain, energy resolution, and electron transparency of the 128 um Micromegas in argon-based gas mixtures to optimize the operating drift and amplification field. We observe the...
In this paper, we attempt to find the neutrino oscillation parameters at low energy scale from high energy scale input values. These oscillation parameters are generated through radiative corrections under renormalization group equations (RGEs) in minimal supersymmetric model (MSSM). We assume that some particular symmetries exist at very high energy scale and such symmetries can lead to...
Resistive Plate Chamber (RPC) is a gaseous detector, which is going to be used as an active detector element for the Iron CALorimeter (ICAL) experiment, which is planned to be built by the India-based Neutrino Observatory (INO). A gas mixture consisting of R134a (95.2%), Iso-Butane (4.5%) and SF6 (0.3%) is used to operate the RPCs in the Avalanche mode. Composition of gas mixture plays a...
Relativistic dissipative hydrodynamics is an effective macroscopic theory of a near-equilibrium system. It is a tool to explore the collective behaviour of the strongly interacting medium produced in heavy-ion collisions. The ideal hydrodynamic simulation deals with the evolution equations of hydrodynamic variables derived from the conservation laws using the equation of state as an input. To...
Hadronic resonances are a unique tool to study the properties of the hadronic phase created after high energy collisions via regeneration and rescattering of their decay products. Studying the dependence of the yield of resonances on transverse spherocity and multiplicity allows us to understand the resonance production mechanism with event topology and system size, respectively. Furthermore,...
A simulation-based projection study has been performed for a search for a vector-
like top quark partner T in proton-proton (pp) collisions at √s = 14 TeV. The search
considers the operational conditions of the High-Luminosity LHC (HL-LHC). The
production pp → TT is followed by the decays T → bW, T → tH, and T → tZ with
equal branching fractions of 1/3. Events with one electron or muon,...
A search for high mass resonances decaying into a pair of W bosons is presented. The analysis is based on proton-proton collisions observed by the CMS experiment at the CERN LHC for full Run 2, corresponding to an integrated luminosity of 138 fb−1 at sqrt(s) = 13 TeV. The analysis considers the fully leptonic final state . New techniques are implemented in the analysis to improve the...
The conservation of lepton flavor is one of the accidental symmetries of the SM. Charged lepton flavor violating processes are forbidden in the SM. Still, some new physics models, such as the leptoquark model, predict these processes that could be observed in a high-energy physics experiment.
Bottomonium system is a good place to study such processes. Belle experiment is a flavor physics...
We search for the decay $B_s^0\rightarrow J/\psi \pi^0$ using 121.4 $fb^{-1}$ of data collected at $\Upsilon(5S)$ resonance state by the Belle detector at the KEKB asymmetric energy $e^+e^-$ collider located at the High Energy Accelerator Research Organisation, KEK, in Japan. In the Standard Model, the decay is expected to be rare, proceeding through the $W$-boson exchange and annihilation...
The CDF-II collaboration’s recent high-precision measurement of $W$ boson mass, $M_{W}^{\text{CDF}}$ = 80.4335 $\pm$ 0.0094 GeV, indicates $7-\sigma$ deviation from the SM expectation $M_{W} = 80.354 \pm 0.007$ GeV. This leads us to investigate the extension of SM, which can account for aforementioned problems with SM. We investigate the possibility of the well-known canonical Scotogenic...
During peripheral heavy ion collisions in RHIC and LHC experiments, a huge magnetic field can be created. So, quark gluon plasma (QGP), produced in this heavy ion collision experiments, can face this strong magnetic field, which can decay with time. The electrical conductivity of QGP can be guiding quantity for this decay profile of the magnetic field. Present work has tried to explore the...
Neutrinos are massless in SM but one can introduce Majorana neutrino masses effectively through a dimension-five lepton number non-conserving operator $-\mathcal{L}_\nu^{d=5}=\frac{1}{\Lambda}(\overline{L}\Phi)(\Phi^TL^c)+h.c.$. The linear seesaw mechanism provides a interesting UV-completion of this operator realized in the simplest $SU(3)_c\otimes SU(2)_L\otimes U(1)_Y$ gauge structure. In...
We propose a two-component fermionic Dark Matter(DM) in a minimal
U(1)B extension of Standard Model(SM) with the inclusion of one complex
scalar S(1, 1, 0, −3) along with the usual Higgs doublet. Out of the 3 exotic
fermions added for anomaly cancellation, DM emerges as a mixture of the neutral component of the fermionic doublet and a singlet fermion. The motivation of
our work lies in the...
We analytically calculate the conversion probability $P_{\mu e}$ in the presence of sterile neutrinos, with exact dependence on $\Delta m^2_{41}$, and with matter effects explicitly included. Using perturbative expansion in small parameters, we show that the terms involving mixing angles $\theta_{24}$ and $\theta_{34}$ can be separated out, with the effects of the latter only arising due to...
Measuring the trilinear Higgs self-coupling parameter $\lambda_{HHH}$, which crucially describes the shape of Higgs potential, is among the key mandates at the Large Hadron Collider (LHC) experiments. In proton-proton collisions, this coupling can be probed directly by studying the production of the Higgs boson pair. Due to the rarity of the HH production signal, the analysis usually requires...
We have provided a modified grand canonical ensemble formulation for a multi-component hadron resonance gas system. We have considered the attractive as well as repulsive interaction among the constituent baryons (antibaryons) and obtained a Van der Waals type equation of state. The weak decay contributions of the heavier resonances have also been taken into account. Using our formulation we...
The measurement of the production cross section and transverse momentum ($p_T$) spectrum of $Z$ boson at the LHC provides first tests of the Standard Model (SM). This measurement could be sensitive to exotic physics processes in new energy regime. The $Z$ boson production is also a common background process for many other physics analyses and therefore it must be well understood. In this...
The superconformal bootstrap program for $\mathcal{N}=2$ superconformal field theories was initiated by Rastelli.et.al. The main ingredient for bootstrapping any CFTs is a four point function and which can be expressed interms of conformal partial waves. In this work we have computed the superconformal partial waves of the four-point correlator $\langle JJ\Phi\Phi^{\dagger}\rangle$, in which...
We revisit the symmetries of an isolated horizon (IH), exploiting some freedom in the choice of intrinsic data. The supertranslations are realized as additional symmetries. Furthermore, it is shown that all smooth vector fields tangent to the cross sections are Hamiltonian. We show that joining two IHs which differ in these Hamiltonians and boundary data, under the action of a...
A long-baseline Deep Underground Neutrino Experiment (DUNE) is a novel and ambitious setup which will come-up in midwestern United State.This world class laboratory will not only address the fundamental questions about the nature of elementary particles and their role in the universe but it aims to announce groundbreaking discoveries.
In DUNE the measurements of neutrino oscillation...
We consider the twisted-diffeomorphism framework of canonical noncommutative spaces in which the noncommutative version of metric tensor, Christoffel symbols, curvature tensors and curvature scalars are constructed in terms of their commutative counterparts. Further, we consider the two commutative spaces that are related to each other by a non-injective coordinate transformation i.e., a...
While the triplet-like Higgses up to a few hundred GeV masses are already excluded for a vast region of the model parameter space from the LHC searches, strikingly, there is a region of this parameter space that is beyond the reach of the existing LHC searches, and doubly/singly-charged and neutral Higgses as light as 200 GeV or even lighter are allowed by the LHC data. We study several search...
The flavor symmetry-breaking scale of the Froggatt-Nielsen (FN) mechanism is very weakly constrained by current experiments and can lie anywhere from a few TeV to the Planck scale. We develop ultraviolet (UV) complete models that generate the FN mechanism, with a global $U (1)_{\rm{FN}}$ flavor symmetry for two commonly used charge assignments. We explore the possibility of a strong...
We consider canonical noncommutativity among spacetime coordinates which gives rise to twisted Conformal algebra and twisted Poincare algebra. Different aspects of Weyl Tensor in four-dimensional noncommutative spacetime are discussed. We calculate the noncommutative correction to Weyl Tensor in noncommutative Minkowski spacetime in Spherical polar coordinate and Conformally compactified...
We study the possibility of generating baryon asymmetry of the universe from dark matter (DM) annihilations during non-standard cosmological epochs. Considering the DM to be of weakly interacting massive particle (WIMP) type, the generation of baryon asymmetry via leptogenesis route is studied where WIMP DM annihilation produces a non-zero lepton asymmetry. Adopting a minimal particle physics...
