PHOENIX-2023

Session

Parallel: DM + neutrino

19 Dec 2023, 14:30

Convention Center CC2 (IIT Hyderabad)

Conveners

Parallel: DM + neutrino: Day 2 Afternoon Session 1

• Arindam Chatterjee (Shiv Nadar Institution of Eminence (Deemed to be University))

Parallel: DM + neutrino: Day 2 Afternoon Session 2

• S Mitra

Parallel: DM + neutrino: Day 3 Afternoon Session 1

• Sukanta Dutta (SGTB Khalsa College, University of Delhi.)

Parallel: DM + neutrino: Day 3 Afternoon Session 2

• Mamta Dahiya (S.G.T.B. Khalsa College, University of Delhi)

2. Coannihilation and scotogenic fermionic dark matter

Anirban Karan

19/12/2023, 14:30

Talk

Though the Standard Model assumes the neutrinos to be massless, the phenomenon of neutrino oscillation shows that they have tiny but non-zero masses. Scotogenic models, in which neutrino masses are generated at one-loop level and remain tiny due to loop suppression, are very interesting in this regard. In these models, since the beyond Standard Model (BSM) particles entering inside the...

61. Quantum Spread Complexity in Neutrino Oscillations

Dr Khushboo Dixit (Centre for Astro-Particle Physics, University of Johannesburg)

19/12/2023, 14:50

Talk

Neutrino flavor oscillation is a widely studied physical phenomenon with significant implications for our understanding of particle physics and the search for physics beyond the standard model. Oscillation arises due to the mixing between flavor and mass eigenstates, and their evolution over time. It is a quantum system where flavor transitions are typically studied using probabilistic...

9. Multi-Component Dark Matter: Identifying at Collider

Dr Purusottam Ghosh (Indian Association for the Cultivation Of Science, Kolkata)

19/12/2023, 15:10

Talk

In this talk, I will demonstrate how having two WIMPs, each with different masses, and mass splitting with the NLSP, generated at a collider through a decay chain, can result in double peaks in the missing energy or missing transverse momentum distribution of the multilepton signal. I will also outline a set of criteria to identify and segregate the second peak in the missing energy spectrum,...

17. Constraining New Physics with Possible DM Signatures from the Study of Low Energy Processes

Ms Lipika Kolay (IIT Guwahati)

19/12/2023, 15:30

Talk

We constrain the parameter space of a simplified fermionic dark matter model with a spin-0 mediator from low energy processes. FCNC observables like neutral pseudoscalar meson mixing, rare decays of $B_0,B_s^0,K$ meson, global fit of all the $b\to s\ell \ell$ observables, invisible decays of B and K meson are considered along with FCCC observables like $t\to b{W}_{\mu }$ anomalous...

39. Light Dirac neutrino portal dark matter with gauged B-L symmetry

Nayan Das (Indian Institute of Technology, Guwahati)

19/12/2023, 15:45

Talk

We study a scenario where origin of dark matter is related to the Dirac nature of neutrino, known as the light Dirac neutrino portal dark matter (DNPDM). In such DNPDM set up, light dirac neutrinos take the role of mediating the interactions between dark matter (DM) and standard model (SM) bath. Here, we consider a UV complete model in gauged B-L framework extended by three species of right...

24. Phenomenology of an asymmetric Scotogenic model

Noel Jobu (Shiv Nadar University)

19/12/2023, 16:30

Talk

In this study, we propose a new version of the Scotogenic model, it is an economically appealing theoretical framework which addresses two problems of particle physics, neutrino mass generation and dark matter. The Scotogenic model generates neutrino mass via a $1$-loop Feynman diagram by extending the standard model by the $Z_2$ discrete symmetry.
In our model, we extend the standard model...

3. Exploring Sub-GeV Dark Matter Boosted by Diffuse Supernova Neutrino Background: Insights from XENONnT and LUX-ZEPLIN Experiments

Mr Anirban Majumdar (Indian Institute of Science Education and Research - Bhopal)

19/12/2023, 16:45

Talk

In recent years, there has been a growing interest in the direct detection of sub-GeV dark matter, which is theoretically well-motivated. However, probing sub-GeV cold dark matter particles has posed a persistent challenge, as their typical momenta are insufficient to induce recoils above the thresholds of conventional direct detection experiments. Notably, even very strongly interacting dark...

13. Majorons Revisited: light dark matter as FIMP

Soumen Kumar Manna

19/12/2023, 17:00

Talk

We show that Majoron, the pseudo-Nambu-Goldstone boson resulting from the spontaneous breaking of global lepton number symmetry, can present itself as a viable freeze-in type of dark matter in a mass range keV-GeV, thanks to the explicit higher dimensional Lepton number breaking operator. Interestingly, the proposal is restricted within the simplest extension of the Standard Model with two...

7. Phenomenology of Dirac Scotogenic Model

Mr Sushant Yadav (IISER Bhopal, India)

19/12/2023, 17:15

Talk

The Dirac scotogenic model provides an elegant mechanism which explains small Dirac neutrino masses and neutrino mixing with a single symmetry simultaneously protecting the ''Diracness'' of the neutrinos and the stability of the dark matter candidate. In addition to exploring the phenomenology of dark matter, we will also investigate the implications for lepton flavor violation, the muon...

10. The dynamics and detection possibility of a pseudo-FIMP dark matter

Mr Dipankar Pradhan (IIT Guwahati)

19/12/2023, 17:30

Talk

In a two-component dark matter (DM) set-up, when DM${}_1$ is in equilibrium with the thermal bath, the other one, DM${}_2$, can be equilibrated only by the sizeable interaction with the DM${}_1$, even without any connection with the visible-sector particles. We affirm that such DM candidates (DM${}_2$) have unique `freeze-out' characteristics impacting the relic density, direct, indirect and collider...

85. Classically Conformal U(1) (B-L) model: Lessons from the Collider and Cosmology

Saurabh Niyogi (Harish-Chandra Research Institute)

19/12/2023, 17:45

34. Self-interacting dark matter and the GRB221009A event

Vicky Singh Thounaojam (Indian Institute of Technology, Hyderabad)

20/12/2023, 14:30

Talk

In this work, we explore the intriguing possibility of connecting self-interacting dark matter (SIDM) with the recently observed exceptionally bright and long-duration gamma-ray burst (GRB221009A). The proposed minimal scenario involves a light scalar mediator, simultaneously enabling dark matter (DM) self-interaction and explaining the observed very high energy photons from GRB221009A...

35. Singlet-doublet fermion dark matter with Dirac neutrino mass, (g − 2)μ and ∆Neff

Sujit Kumar Sahoo (Indian Institute of Technology Hyderabad)

20/12/2023, 14:45

Talk

We study the possibility of generating light Dirac neutrino mass via scotogenic mechanism where singlet-doublet fermion dark matter (DM) plays non-trivial role in generating one-loop neutrino mass, anomalous magnetic moment of muon $(g-2{)}_{\mu }$ as well as additional relativistic degrees of freedom $\mathrm{\Delta }{N}_{\mathrm{e}\mathrm{f}\mathrm{f}}$ within reach of cosmic microwave background (CMB) experiments. We show that...

18. Constraining an extra dimensional U(1)Lmu − Ltau model through electron-neutrino elastic scattering

Mr Dibyendu Chakraborty (Shiv Nadar Institution of Eminence)

20/12/2023, 15:00

Poster

Extra dimensional models are very popular and useful framework to address
many important problems in particle physics. On the other hand extension of the Standard Model (SM) with an extra U(1)Lmu−Ltau gauge group is a great motivation to solve muon (g-2) anomaly (recently 5.1 sigma deviation). Here we considered an extra dimensional U(1)Lmu − Ltau model where only the Kaluza-Klein (KK) modes...

25. Realizing Electroweak Baryogenesis in connection to dark sector

Dipendu Bhandari

20/12/2023, 15:15

Talk

We propose that electroweak baryogenesis (EWBG) scenario can be operative with the help of an additional SM scalar singlet which is not only responsible for making the electroweak phase transition strongly of first order but also acts as a mediator between the SM and a dark sector. The dark sector is equipped with a singlet-doublet fermion framework that, apart from explaining the observed...

55. Thermal correction to Dark matter annihilation processes at NLO

Mr Prabhat Butola (Homi Bhabha National Institute, Mumbai & The Institute of Mathematical Sciences, Chennai)

20/12/2023, 15:30

Talk

In a scattering process in a thermal plasma, thermal fluctuation alongside with quantum fluctuation affects the annihilation cross section of particles. This is important in the context to dark matter annihilation cross section since the relic densities are now being more precisely measured. We investigate the effect of thermal fluctuation on the annihilation cross section of a $SU(2) \times...

37. Radiative Corrections to the Direct Detection of the Higgsino-like Neutralino Dark Matter: Spin-Independent Interactions

Syed Adil Pasha (Shiv Nadar Institution of Eminence, Greater Noida)

20/12/2023, 15:45

Talk

The lightest Neutralino is a good Dark Matter (DM) candidate
in the R-parity conserving Minimal Supersymmetric Standard Model (MSSM). In this work, we consider light Higgsino-like Neutralino as the Lightest
Stable Particle (LSP), thanks to a relatively small $\mu$ parameter. We then estimate the prominent radiative corrections to the Neutralino-Neutralino-Higgs boson vertices.
We show that...

8. Neutrino Mass Sum Rules from Modular ${\mathcal{A}}_4$ Symmetry

Mr Ranjeet Kumar (Department of Physics, Indian Institute of Science Education and Research - Bhopal)

20/12/2023, 16:30

Talk

Modular symmetries offer a dynamic approach to understanding the flavour structure of leptonic mixing. Using the modular ${\mathcal{A}}_4$ flavour symmetry integrated in a type-II seesaw, we propose a simple and minimalistic model that restricts the neutrino oscillation parameter space and, most importantly, introduces a sum rule in the physical neutrino masses. When combined with the mass...

28. Viability of Boosted Light Dark Matter in a Two-component Scenario

Arindam Basu (SRM University AP Andhra Pradesh)

20/12/2023, 16:45

Talk

We study the two-component boosted dark matter (DM) scenario in a neutrinophilic two-Higgs doublet model (ν2HDM), which comprises one extra Higgs doublet with a MeV scale CP-even scalar H. This model is extended with a light (∼ 10 MeV) singlet scalar DM ϕ3, which is stabilized under the existing Z2 symmetry and can only effectively annihilate through scalar H. As the presence of a light H...

36. Probing Dark Matter-Electron Interactions in the Cosmic Microwave Background Radiation

Rahul Dhyani (Shiv Nadar Institution of Eminence (Deemed to be University))

20/12/2023, 17:00

Talk

Cosmological observations offer valuable methods for probing various characteristics of Dark Matter (DM). We examine the cosmological implications of higher-dimensional Non-Relativistic Effective Field Theory (EFT) operators for Dark Matter(DM) - electron interactions. We focus on velocity-independent operators and simultaneously incorporate DM-electron scattering and DM annihilation into...

26. Exploring Axions through the Photon Ring of a Spherically Symmetric Black Hole

Pratick Sarkar (Indian Association for the Cultivation of Science)

20/12/2023, 17:15

Poster

In this study, we examine the phenomenon of photon axion conversion occurring in the spacetime surrounding a black hole. Observations of the black hole in the center of the M87 galaxy (M87 * ) through the Event Horizon Telescope imaged polarized synchrotron emission at 230 GHz on event horizon scales. Specifically, we focus on the potential existence of a magnetic field around the supermassive...