Conference on Flavor Physics and CP Violation (FPCP 2019)

Session

Parallel session 2

7 May 2019, 16:15

Bob Wright, B150

Conveners

Parallel session 2: Tuesday

• Derek Harnett

Parallel session 2: Wednesday

• Diego Martinez Santos

Parallel session 2: Thursday

• Mike Roney

4. New Physics in $b\to c\tau \nu$: Impact of Polarisation Observables and $B_c\to \tau \nu$

Marta Moscati (Karlsruhe Institute of Technology (KIT))

07/05/2019, 16:15

Heavy Quark Decays and CKM Metrology

Contributed Oral

In this talk I review the status of new physics in $b\to c\tau \nu$ transitions in the EFT framework of dimension-six operators. The fit results, including the recent measurement of $F_L(D^{\ast })$, are presented for all one- and two-dimensional scenarios resulting from the tree level exchange of a single new particle. Particular emphasis is put on the constraint from the $B_c\to \tau \nu$ decay...

11. Production of Lambda_b baryon and B0s mesons at LHCb

Siim Tolk (LHCb)

07/05/2019, 16:30

Heavy Quark Decays and CKM Metrology

Contributed Oral

Heavy hadron production is well-suited as a benchmark process for understanding QCD. While b-quark production properties can be estimated within perturbative QCD, the subsequent fragmentation into a b hadron is a non-perturbative process and cannot be calculated from the first principles. Our understanding of fragmentation functions and fractions thus relies solely on experimental input....

30. Observation of several sources of CP violation in B+ -> pi+pi+pi- decays

Dr Alvaro Gomes dos Santos Neto (UFTM, Brazil)

07/05/2019, 16:45

CP Violation in Hadrons and Leptons

Contributed Oral

Very large CP asymmetries in decays of B mesons to final states containing three charged particles have been observed and attracted much interest. We present new results from a Dalitz plot analysis of B->3pi using a data sample corresponding to an integrated luminosity of 3 fb-1 of pp collisions recorded by the LHCb detector. Significant CP violation from different sources (S-wave, D-wave,S-P...

26. First look at time dependent CP violation using early Belle II data

Dr Stefano Lacaprara (INFN Padova)

07/05/2019, 17:00

CP Violation in Hadrons and Leptons

Contributed Oral

The Belle II experiment at the SuperKEKB energy-asymmetric $e^{+}{e}^{-}$ collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. The design luminosity of the machine is $8\times {10}^{35}$ cm${}^{-2}$s${}^{-1}$ and the Belle II experiment aims to record 50 ab${}^{-1}$ of data, a factor of 50 more than its predecessor. From February to July 2018, the machine has...

10. Renormalization Effects on Electric Dipole Moments in Electroweakly Interacting Massive Particle Models

Dr Takumi Kuwahara (Institute for Basic Science)

07/05/2019, 17:15

CP Violation in Hadrons and Leptons

Contributed Oral

We study the renormalization effects on electric dipole moments in the models with new electroweakly interacting massive fermions. The electric dipole moments are generated by the effective operators which arise from integrating out heavy particles at some scale in the models. We give the renormalization group equation for the Wilson coefficients of the effective operators from the scale where...

118. Production of quarkonia and heavy flavour states in ATLAS

Dr Sally Seidel (University of New Mexico)

07/05/2019, 17:30

Heavy Quark Decays and CKM Metrology

Contributed Oral

Associated production of vector boson with quarkonia is a key observable for understanding the quarkonium production mechanisms, including the separation of single and double parton scattering components. This talk will present the latest differential measurements from ATLAS of associated-quarkonium production. In addition, recent results on heavy flavour production measurements are reported...

104. Lepton non-universality in B-meson decays in the minimal leptoquark models

Dr Michal Malinský (IPNP, Charles University in Prague)

08/05/2019, 13:55

15. Searching for leptoquarks with the ATLAS detector

Mr Vincent Wong (U. of British Columbia)

08/05/2019, 14:10

Flavor and the Higgs and Dark Sectors

Contributed Oral

Leptoquarks (LQ) are predicted by many new physics theories to describe the similarities between the lepton and quark sectors of the Standard Model and offer an attractive potential explanation for the lepton flavour anomalies observed at flavour factories. The ATLAS experiment has a broad program of direct searches for leptoquarks, coupling to the first-, second- or third-generation...

24. Semileptonic and leptonic B decay results from early Belle II data

Dr Markus Prim (Karlsruhe Institute of Technology)

08/05/2019, 14:25

Heavy Quark Decays and CKM Metrology

Contributed Oral

The Belle II experiment at the SuperKEKB energy-asymmetric $e^{+}{e}^{-}$ collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. The design luminosity of the machine is $8\times {10}^{35}$ cm${}^{-2}$s${}^{-1}$ and the Belle II experiment aims to record 50 ab${}^{-1}$ of data, a factor of 50 more than its predecessor. From February to July 2018, the machine has...

27. B lifetime and $B^0-{\overline{B}}^0$ mixing results from early Belle II data

Jakub Kandra (Charles University)

08/05/2019, 14:40

Heavy Quark Decays and CKM Metrology

Contributed Oral

The Belle II experiment at the SuperKEKB energy-asymmetric $e^{+}{e}^{-}$ collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. The design luminosity of the machine is $8\times {10}^{35}$ cm${}^{-2}$s${}^{-1}$ and the Belle II experiment aims to record 50 ab${}^{-1}$ of data, a factor of 50 more than its predecessor. From February to July 2018, the machine has...

1. Holographic QCD predictions for rare B decays

Dr Mohammad Ahmady (Mount Allison University)

08/05/2019, 14:55

Rare Decays of Hadrons and Leptons

Contributed Oral

Light-front wavefunctions obtained from holographic AdS/QCD are used to obtain the distributions amplitudes for light mesons. Consequently, alternate predictions for B transition to light mesons form factors are presented. In this talk, I compare our results for rare B decays to those obtained from QCD sum rules.

19. Dark Sector Physics with Belle II

Prof. Christopher Hearty (U. British Columbia/IPP)

09/05/2019, 17:00

Flavor and the Higgs and Dark Sectors

Contributed Oral

The Belle II experiment is a substantial upgrade of the Belle detector and will operate at the SuperKEKB energy-asymmetric $e^{+}{e}^{-}$ collider. The design luminosity of the machine is $8\times {10}^{35}$ cm${}^{-2}$s${}^{-1}$ and the Belle II experiment aims to record 50 ab${}^{-1}$ of data, a factor of 50 more than its predecessor. From February to July of this year, the machine has completed a...

28. Electric Dipole Moments From Dark Sectors

Dr Shohei Okawa (University of Victoria)

09/05/2019, 17:15

Flavor and the Higgs and Dark Sectors

Contributed Oral

We examine the sensitivity of electric dipole moments (EDMs) as precision observables for new $CP$-violating physics in a dark sector. Assuming that the dominant mediation channel is via one or more of the vector, Higgs or neutrino portals, we examine the leading EDM contributions. The dominant contributions arise at two-loop order, and EDMs can provide sensitivity to portal couplings that is...

32. Higgs boson couplings to quarks at the ATLAS experiment

Dr Claire David (DESY)

09/05/2019, 17:30

Flavor and the Higgs and Dark Sectors

Contributed Oral

Testing the couplings of the Higgs boson to quarks is important to understand the origin of quark masses. The talk presents cross section measurements in Higgs boson decays to two b quarks, as well as a search for Higgs boson decays to two c quarks. It also presents measurements of Higgs boson production in association with a ttbar pair using Higgs boson decays to bbbar pairs, to two...

21. ATLAS measurements of CP Violation and Rare decays in Beauty mesons

Dr Wolfgang Walkowiak (Siegen)

09/05/2019, 17:45

Contributed Oral

The ATLAS experiment has performed accurate measurements of mixing and CP violation in the neutral B mesons, and also of rare processes happening in electroweak FCNC-suppressed neutral B-mesons decays. This talk will focus on the latest results from ATLAS, such as rare processes: B^0_s -> mu mu and B^0 -> mu mu; and CPV in Bs to Jpsi Phi.