Conveners
Collider Physics - Flavour: 1
- Timothy Gershon (University of Warwick (GB))
Collider Physics - Flavour: 2
- Mark Richard James Williams (The University of Edinburgh (GB))
Description
Dedicated to the study of flavour physics at colliders, this track examines the production and decay of heavy-flavour particles, CP violation, and rare processes. Topics include results from experiments and the implications of flavour anomalies for physics beyond the Standard Model.
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Lucas Arthur Foreman (The University of Manchester (GB))07/04/2025, 16:00Collider Physics - FlavourParallel talk
The status of the work towards a measurement of the CKM angle $\gamma$ with $B_d^0 โ D^{โ} ฯ^{ยฑ}$ decays in the LHCb run 2 data set is presented. The work presented includes signal isolation, time resolution studies, and neutral $B$ meson flavour tagging. Neutral $B$ meson flavour tagging is an integral component of analyses of this kind, which allows for the separation of $B_d^0$ and...
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Xiaohan Wang (Imperial College (GB))07/04/2025, 16:15Collider Physics - FlavourParallel talk
With measurements in the b->sll transitions made by the LHCb showing deviations with the Standard Model, a similar measurement on the B->ฯฮผฮผ decay involving a suppressed b->dll transition has been proposed for a potentially more sensitive probe on the new physics. To maximise the experimental sensitivity, an unbinned maximum likelihood fit is applied to the dimuon mass spectrum using the full...
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Mr Abhishek Bohare (The University of Edinburgh (GB))07/04/2025, 16:30Collider Physics - FlavourParallel talk
Radiative decays of charmed hadrons are highly sensitive to flavor-changing processes, which are governed by the Standard Model (SM) but could also be influenced by new physics (NP). This sensitivity arises due to the Glashow-Iliopoulos-Maiani (GIM) suppression mechanism, which significantly restricts processes such as $|\Delta c| = |\Delta u| = 1$. The radiative charm decay $D^0 \rightarrow...
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Josh Bex (University of Cambridge (GB))07/04/2025, 16:45Collider Physics - FlavourParallel talk
This talk will present a search for rare $b \rightarrow s \tau^{+} \tau^{-}$ transitions via the decay $\Lambda_{b}^{0} \rightarrow p K^{-} \tau^{+} \tau^{-}$, using $5.4 \ {\rm fb}^{-1}$ of data collected by the LHCb experiment. New Physics explanations for anomalies in combined fits to $R(D)$ and $R(D^{*})$ predict enhanced branching fractions of several orders of magnitude for $b...
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Asim Mohammed Aslam (University of London (GB))07/04/2025, 17:00Collider Physics - FlavourParallel talk
Same- and opposite-sign charge asymmetries are measured in top-quark pair events in which a b-hadron decays semileptonically to a muon, using data corresponding to an integrated luminosity of 139 fbโ1 from protonโproton collisions at a centre-of-mass energy of โs = 13TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. The charge asymmetries are based on the charge of...
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Jozie Meldrum (University of Bristol)07/04/2025, 17:15Collider Physics - FlavourParallel talk
The CKM angle $\gamma$ is a free parameter of the Standard Model of particle physics that determines the level of CP-violation in the quark sector. Measurements of this parameter test the unitarity property of the CKM matrix and act as a sensitive probe for physics beyond the SM. As such, it is a focus of several analyses at LHCb. Direct measurements are usually limited by factors such as...
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Aleksandrina Docheva (University of Glasgow (GB))07/04/2025, 17:30Collider Physics - FlavourParallel talk
In this talk, I present an amplitude analysis of $B^+ \to D^- K^+ \pi^+$ decays using the full data samples collected by the LHCb experiment at the Large Hadron Collider in Run I and II. The structure in the Dalitz plot of the decay allows us to study excited neutral charm meson states in the $m(D^-\pi^+)$ system, measuring masses, widths and quantum numbers. The study of excited charm states...
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Ned Francis Howarth (University of Liverpool (GB))07/04/2025, 17:45Collider Physics - FlavourParallel talk
We present an ongoing search for the decay mode $\Lambda_b^0 \rightarrow \Lambda_c^+ \overline{\Lambda}_c^- n$, utilising pp collision data collected at a center of mass energy of $\sqrt{s}$ = 13 TeV recorded by the LHCb detector. The sample was collected in 2016-2018 during Run 2 of the Large Hadron Collider. This analysis marks the first search at the LHC featuring a final-state neutron,...
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Francesca Swystun (University of Cambridge (GB))09/04/2025, 11:00Collider Physics - FlavourParallel talk
A charmless $B \to VV$ decay consists of a B-meson to two spin-one vector decay with a four hadron final state. The decay amplitude for a given $B \to VV$ decay is described by a basis of three amplitudes, where a particiular interest in these decays stems from the expected hierarchy in these vector-vector amplitudes being violated for modes involving penguin decays (this is often referred to...
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Marcus Jonathan Madurai (University of Birmingham (GB))09/04/2025, 11:15Collider Physics - FlavourParallel talk
Charged Lepton Flavour Violation (cLFV) is only permitted in the Standard Model of Particle Physics through the oscillation of a neutrino, and hence has branching fractions of the order $10^{-54}$, well below the reach of current experiments. Therefore, searches for cLFV have direct sensitivity to new physics models that would enhance the production of such modes, where any observation...
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Jairus Patoc (University of Oxford (GB))09/04/2025, 11:30Collider Physics - FlavourParallel talk
The search for mixing-related CP violation in the charm sector is a topic of significant interest, as this phenomenon is predicted to occur at an extremely suppressed level within the Standard Model. Consequently, any observable signal at the current experimental sensitivity could provide compelling evidence for New Physics. Such measurements can be achieved through phase-space binned analyses...
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David Bacher (University of Oxford (GB))09/04/2025, 11:45Collider Physics - FlavourParallel talk
A measurement of the effective lifetime in $B^0 \to J/\psi K^{*0}$ decays will be performed utilizing data collected in 2024 with the newly upgraded LHCb Upgrade I detector. Effective lifetime measurements of $b$-mesons offer a precise probe for weak decays in the Standard Model. These lifetimes can be calculated within the Heavy Quark Expansion (HQE) framework, though precise theoretical...
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Lanxing Li (The University of Manchester (GB))09/04/2025, 12:00Collider Physics - FlavourParallel talk
We present a search for $CP$ violation in the Cabibbo-suppressed $D^0\to \pi^+ \pi^- \pi^0 $ mode with more than 1.6M signal candidates, allowing for the most precise amplitude modelling of this decay to date. The measurement uses data sample of $pp$ collisions collected by the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity of 5.4 $fb^{-1}$. The $D^0$ mesons are...
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Yiming Liu (The University of Edinburgh (GB))09/04/2025, 12:15Collider Physics - FlavourParallel talk
Flavour Changing Neutral Current (FCNC) decays of $B_s^0$ meson into a pair of charmless mesons has been the subject of much experimental and theoretical interest. The decay process is predominated by the loop-level $\bar{b}\to\bar{s}s\bar{s}$ progress, which is suppressed in the Standard Model. This analysis is aimed to measure the branching fraction of the rare decay mode...
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