Bulletin of the American Physical Society
89th Annual Meeting of the Southeastern Section of the APS
Volume 67, Number 18
Thursday–Saturday, November 3–5, 2022; University of Mississippi, University, MS
Session K01: CP(T) Physics |
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Chair: Gavin Davies, University of Mississippi Room: University of Mississippi Ballroom A |
Friday, November 4, 2022 2:00PM - 2:30PM |
K01.00001: Measurement of the CP-violating parameters in the Bs0->J/ψφ decay using proton-proton collision data collected by CMS at √s = 13 TeV. Invited Speaker: Alibordi Muhammad We live in a matter dominated universe. According to the principle of conservation of quantum numbers the matter and antimatter should have been produced in equal amount in the process called Big-Bang. But the present visible universe does not reflect any significant trace of antimatter. In particle physics terminology we call this phenomenon Baryon asymmetry. |
Friday, November 4, 2022 2:30PM - 3:00PM |
K01.00002: Axion-like particles resolve the B→π K and g-2 anomalies Invited Speaker: John Waite We offer a new solution to an old puzzle in the penguin-dominated B → π K decays. The puzzle is the inconsistency among the measurements of the branching ratios and CP asymmetries of the four B → π K decays : B+ → π+ K0 , B+ → π0 K+ , Bd0 → π- K+ , Bd0 → π0 K0 . We solve the B → π K puzzle by considering the effect of an axion-like particle (ALP) that mixes with the π0 and has mass close to the π0 mass. We show that the ALP can also explain the anomalies in the electron and muon anomalous magnetic moments. |
Friday, November 4, 2022 3:00PM - 3:30PM |
K01.00003: Overview of Belle II experiment Invited Speaker: Suravinda J Kospalage Belle II is a particle physics experiment at the SuperKEKB asymmetric electron-positron accelerator based at the KEK laboratory in Tsukuba Japan. As the successor to the Belle experiment, which ran from 1999 to 2010, Belle II has a design luminosity of 6 X 1035 cm-2s-1 and aims to collect 50 ab-1 of data, nearly 50 times as much as its predecessor. With this data sample, Belle II will measure interesting phenomena with unprecedented precision, from measurements of CKM elements using B and charmed mesons, lepton flavor violation and electroweak physics to QCD measurements and dark sector searches. Results published with early data are already proving the capability of the Belle II detector to make precision measurements. In this presentation, I will introduce the Belle II experiment, review its latest results, and present some prospects for future measurements.Jake |
Friday, November 4, 2022 3:30PM - 3:42PM |
K01.00004: Search for New Physics Contributions in the Form of an Intermediate Charged Higgs Romulus Godang We present a measurement of the ratio R(D*) = BR(B to D^* tau nu) / BR(B -> D* ell nu), where ell is either electron or muon. Using a data sample of 426/fb electron-positron collisions with the BABAR detector at SLAC's PEP-II collider,we reconstructed tag B-mesons in semileptonic decays and signal B-mesons with tau decays into a purely leptonic.This ratio is sensitive to new physics contributions in the form of an intermediate charged Higgs boson. Combining this measurement with other measurements the disagreement with the Standard Model prediction will be presented. |
Friday, November 4, 2022 3:42PM - 3:54PM |
K01.00005: Probing BSM Physics in B→D*lν Using Monte Carlo Simulation Quinn D Campagna, Thomas E Browder, Alakabha Datta, Lopamudra Mukherjee, Bhubanjyoti Bhattacharya, Alexei Sibidanov, Shawn B Dubey Several experimental measurements of b-decays have suggested the presence of physics beyond the Standard Model (BSM). One set of such measurements are the decay modes B→D*lν with l=e, μ, and τ. A recent analysis of 2019 Belle data found ΔAFB = AFB(B→D*μν) - AFB(B→D*eν) to be 4.1σ away from the SM prediction. Improved simulation and analysis tools are needed in order to more effectively probe these new physics (NP) possibilities. We have developed a Monte-Carlo event generator tool based on the EVTGEN framework to simulate NP signatures in B→D*lν, which arise due to the interference between the SM and NP amplitudes. We have also simulated several example NP scenarios which are able to explain the ΔAFB anomaly, while remaining consistent with experimental constraints. We also show that Δ-type observables allow for definite signals of NP by removing most QCD uncertainties from the form factors, and introduce several correlated observables that allow for more sensitivity to NP. |
Friday, November 4, 2022 3:54PM - 4:06PM |
K01.00006: Search for CPT and Lorentz Invariance Violation in the Muon g-2 Experiment. Baisakhi Mitra Muon g-2 data can be used to search for a sidereal variation of the anomalous muon precession rate, which is one of the important potential signatures of CPT and Lorentz Invariance Violation in the muon sector. The talk will focus on the analysis framework that has been used to study sidereal variation of this precession in Muon g-2 preliminary Run 2 data. This will include a brief introduction to the signal blinding method, which will be used on entire Run 2/3 dataset. |
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