Conveners
Flavour Physics
- Thomas E. Browder (University of Hawaii (United States))
Flavour Physics
- Cai-Dian Lu (IHEP, Beijing)
Flavour Physics
- Hai-Yang Cheng ()
Flavour Physics
- Rick Van Kooten ()
Flavour Physics
- Ahmed Ali ()
Flavour Physics
- Patrick Koppenburg (Nikhef)
Description
Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)
Dr.
Denis Derkach
(University of Oxford)
04/07/2014, 09:20
Flavour Physics
Oral presentation
The Unitarity Triangle (UT) analyses within and beyond the SM
are powerful tools to summarise the state of the art and explore
the possibilities for future new physics (NP) searches.
We present the update of the Unitarity Triangle analysis
in a scenario beyond the Standard Model. Combining all
available experimental and theoretical information on
DF=2 processes and using a...
Dr.
Avelino Vicente
(Université de Liège)
04/07/2014, 09:40
Flavour Physics
Oral presentation
We present a new kit for the study of flavor observables beyond the standard model. In contrast to previous flavor codes, FlavorKit is not
restricted to a single model, but can be used to obtain predictions for flavor observables in a wide range of models (SUSY and non-SUSY).
FlavorKit can be used in two different ways. The basic usage of FlavorKit allows for the computation of a large...
Mr.
Roel Aaij
(Nikhef)
04/07/2014, 09:55
Flavour Physics
Oral presentation
The Bs meson provides an ideal laboratory for measurements of CP violation and searches for CPV beyond the Standard Model. We present recent LHCb results on measurements of the Bs mixing phase using Bs→J/ψKK and J/ψππ decays.
Mr.
Giacomo Fedi
(University of Helsinki)
04/07/2014, 10:10
Flavour Physics
Oral presentation
In this talk we present a measurement of the time-dependent CP-violating phase phi_s in the decays of B_s -> J/psi phi. The phase phi_s is the key parameter for the CP-violation of the B_s and anti-B_s system. An angular and proper decay time analysis is applied to the Bs->J/psi phi events. Using a data sample collected by the CMS experiment, the Bs signal candidates are reconstructed and are...
Dr.
Leonid Gladilin
(Joint Institute for Nuclear Research (JINR))
04/07/2014, 10:25
Flavour Physics
Oral presentation
The ATLAS detector at the LHC is collecting - among others - a large statistics of Bs and Lambda_b decays, allowing to study their production and decay properties. ATLAS has studied the different amplitudes contributing to the decay Bs -> J/psi phi (mu+mu-K+K-) with a combined analysis of decay time and angular correlations and using initial flavour tagging. The CP-violating phase phi_s is...
Dr.
Liming Zhang
(Syracuse University)
04/07/2014, 10:40
Flavour Physics
Oral presentation
b-hadron decays to J/ψ and light mesons and/or baryons allow to perform studies in the J/ψhh "Dalitz" decay plane. We determine the resonant structure and CP components of B→J/ψKK and ππ, which serve as input to CP violation studies. We also report the observation of new decay modes of the Bc meson and the Λb baryon.
Mr.
Matthew Needham Needham
(University of Edinburgh)
04/07/2014, 11:30
Flavour Physics
Oral presentation
The Bs meson provides an ideal laboratory for measurements of CP violation and searches for CPV beyond the Standard Model. We present recent LHCb results on measurements of the Bs mixing phase using the penguin mediated decay Bs→φφ, which is very sensitive to physics beyond the Standard Model.
Dr.
Jie Lu
(IFIC, University of Valencia)
04/07/2014, 11:45
Flavour Physics
Oral presentation
The rare decays $B_{s,d}^0 \to \ell^+\ell^-$ are analyzed within the general framework of the aligned two-Higgs doublet model. We present a complete one-loop calculation of the relevant short-distance Wilson coefficients, giving a detailed technical summary of our results and comparing them with previous calculations performed in particular limits or approximations. We investigate the impact...
Dr.
Marko Petric
(Jozef Stefan Institute)
04/07/2014, 12:00
Flavour Physics
Oral presentation
We report measurements of the branching fraction (BF) and CP asymmetry ($A_{CP}$) for three rare charmless decays $B^0 \to \pi^0 \pi^0$, $B^0 \to \eta^0 K^{*}(892)^{0}$ and $B^+ \to \bar{K}^{*}(892)^{0} K^{*}(892)^{+}$. Previous measurements of the BF($B^0 \to \pi^0 \pi^0$) are significantly larger than theoretical expectations. The measured BF and $A_{CP}$ in this mode are vital for the...
Mr.
Stefano Perazzini
(INFN e Università di Bologna)
04/07/2014, 12:15
Flavour Physics
Oral presentation
Charmless b-hadron decays are suppressed in the Standard Model by tiny CKM matrix elements which brings the tree amplitudes to levels comparable with loop amplitudes, and potentially New Physics amplitudes. CP violation measurements using Dalitz plot analyses in multi-body decays allow to disentangle these various contributions. We report about the most recent measurements from LHCb, including...
Mr.
Rafael Silva Coutinho
(University of Warwick)
04/07/2014, 12:30
Flavour Physics
Oral presentation
The three-body charmless hadronic decay B0s -> K0SKpi provides a number of novel possibilities to search for CP violation effects and test the Standard Model of particle physics. These include model-dependent and model-independent comparisons of the Dalitz plot distributions of the decay-time-integrated K0SK+pi- and K0SK-pi+ final states, decay-time-dependent (but without initial state flavour...
Veronika Chobanova
(MPI)
04/07/2014, 12:45
Flavour Physics
Oral presentation
We present the results of the time-dependent measurements of CP-violating parameters in $B^0$ decays to the final states $\omega K_S^0$ and $\eta' K^0$. The results are obtained using the full statistics collected by the Belle experiment on $e^+ e^-$ asymmetric-energy collider KEKB, which corresponds to 772 million $B\bar{B}$ events.
Dr.
Nicolas Arnaud
(LAL (CNRS/IN2P3 and Université Paris Sud))
04/07/2014, 13:00
Flavour Physics
Oral presentation
We report a Dalitz plot analysis of the charmless hadronic decays of charged B mesons to the final state Ks pi+ pi0 using the full BABAR dataset of 471 million BBbar events collected at the Upsilon(4S) resonance. We observe an excess of signal events and measure the branching fractions and CP asymmetries, for the different resonant decay modes and inclusively.
Prof.
Hai-Yang Cheng
(Academia Sinica)
04/07/2014, 13:15
Flavour Physics
Oral presentation
Branching fractions and CP-violating asymmetries of charmless three-body decays of B_{u,d} and B_s mesons are studied using a simple model based on the factorization approach. We consider both resonant and nonresonant contributions. Dominant nonresonant contributions to tree-dominated three-body decays can be evaluated using heavy meson chiral perturbation theory valid in the soft meson limit....
Mr.
Mark Smith
(University of Manchester)
04/07/2014, 15:00
Flavour Physics
Oral presentation
LHCb has collected the world's largest sample of charmed hadrons. This sample is used to search for direct and indirect CP violation in charm, and to measure D0 mixing parameters. New updated measurements from several decay modes are presented, with complementary time-dependent and time-integrated analyses. We report on recent measurements of CP asymmetries in D→KK and D→ππ decays using the...
Dr.
Shengsen Sun
(Institute of High Energy Physics)
04/07/2014, 15:15
Flavour Physics
Oral presentation
We measured the asymmetry A_CP of branching ratios of D0—> K-pi+ in the CP-odd and CP-even eigenstates to be (12.7+/1/3+/-0.7)% based on 2.92fb-1 of data accumulated at psi(3770) at BESIII/BEPCII. The A_CP can be used to extract the strong phase difference delta_Kpi between the double Cabbibo-suppressed process D0b —> K-pi+ and the Cabbibo-favored process D0—>K-pi+. Using the world-average...
Mr.
Nisar Nellikunnummel
(Tata Institute of Fundamental Research)
04/07/2014, 15:30
Flavour Physics
Oral presentation
We search for CP violation in $D^0$ and $\bar{D}^0$ decays to the $\pi^0 \pi^0$ final state and measure $D^0$-$\bar{D}^0$ mixing in the decays of $D^0 \to K^+ \pi^-$ and $K_S ^0 \pi^+ \pi^-$. The asymmetry obtained in the rate of $D^0$ and $\bar{D}^0$ decays to the $\pi^0 \pi^0$ final state, $[-0.03 \pm 0.64(stat) \pm 0.10(syst)]\%$, is consistent with no CP violation. The mixing parameters...
Dr.
Denis Derkach
(University of Oxford)
04/07/2014, 15:45
Flavour Physics
Oral presentation
Charmed hadrons are a unique probe of CP violation with up-type quarks. Yet, CP violation in the charm sector is very suppressed by tiny CKM phases in the Standard Model. Any non-zero measurement would thus be a sign of New Physics. We report on recent measurements of CP asymmetries in multibody charmed meson and baryon decays. The CP asymmetries are studied in regions of the Dalitz space.
Dr.
Yangheng Zheng
(University of Chinese Academy of Sciences)
04/07/2014, 16:00
Flavour Physics
Oral presentation
Based on 2.92/fb of data accumulated at psi(3770), BESIII measured the branching ratio of (D+ —> mu+ nu) is about (3.71+/-0.19+/-0.06)x 10^{-4}, and determine the weak decay constant f_D=(203.2+/-5.3+/-1.8)MeV. these are the most precise results.
Based on the psi(3770) -> DDbar data accumulated at the BESIII experiment, we present studies of D0 -> K- e+ nu and D0 -> pi0 e+ nu decays which...
Dr.
Arantza Oyanguren
(IFIC- Valencia)
04/07/2014, 16:15
Flavour Physics
Oral presentation
Precision measurements of the D -> pi e+ nu form factor could shed new light on the persistent difference between inclusive and exclusive measurements of Vub. We report the measurement of the partial branching fraction of D -> pi e+ nu in bins of the four-momentum transfer squared of the D to pi system using 347.2 /fb of integrated luminosity of the BaBar data. The D -> pi form factor is...
Matteo Rama
(Istituto Nazionale di Fisica Nucleare - Frascati)
04/07/2014, 16:30
Flavour Physics
Oral presentation
The datasets that the LHCb and Belle II experiments are expected to collect in the coming years will allow a sub-degree precision measurement of the angle gamma of the CKM unitarity triangle using Bch->D(*)0K(*) decays. To reach this goal a number of effects that have been neglected so far will require careful evaluation. We discuss these corrections with particular emphasis on the impact of...
Dr.
WENBIN QIAN
(LAPP-CNRS)
04/07/2014, 16:45
Flavour Physics
Oral presentation
Decays of b-hadrons to states including open charm provide a rich laboratory to constrain the unitarity matrix and search for new physics. We present recent measurements in this sector, including observations of new decay modes, CP violation and effective lifetime measurements.
Dr.
Yoshiyuki Onuki
(University of Tokyo)
04/07/2014, 17:00
Flavour Physics
Oral presentation
Dalitz plot analyses of $D \to K_S^0 h h$ ($D = D^0$ or $\bar{D}^0$, $h = K$ or $\pi$) decays following $B \to D^{(*)} K^{(*)}$ decay provide sensitive measurements of CP-violating angle $\phi_3$. We present the first measurement of the CP-violating angle $\phi_3$ using a model-dependent Dalitz plot analysis of $B \to D K$, $D \to K_S^0 K^{\pm} \pi^{\mp}$ decays, and unique model-independent...
Mrs.
Agnieszka Dziurda
(The Henryk Niewodniczanski Institute of Nuclear Physics PAS)
04/07/2014, 17:15
Flavour Physics
Oral presentation
The angle γ is the least constrained parameter in the CKM unitarity triangle. Its determination in decays induced by tree-level b→c transitions is largely unaffected by potential new physics contributions. This allows for a consistency check of the unitarity triangle, but also of comparisons with γ determinations from modes with loop-diagrams. We present here a new precise determination of γ...
Dr.
Antonino Sergi
(University of Birmingham (United Kingdom))
05/07/2014, 09:00
Flavour Physics
Oral presentation
The rare decays K+ ->pi+ nu nu are excellent processes to make tests of new physics at the highest scale complementary to LHC thanks to their theoretically cleaness.
The NA62 experiment at CERN SPS aims to collect of the order of 100 events in two years of data taking, keeping the background at the level of 10%.
Part of the experimental apparatus has been commissioned during a technical run...
Prof.
Vladimir Obraztsov
(Institute for High Energy Physics, Protvino, Russian Federation)
05/07/2014, 09:15
Flavour Physics
Oral presentation
The decay K+ --> pi0 e+ nu (Ke3) is studied using in-flight decays detected with the "OKA" setup, working in the RF-separated secondary K+ beam of the U-70 synchrotron. About 10M events are available for the analysis. Preliminary results for the parameters of the f+(t) form-factor are presented. For the linear fit: \lambda_{+}=(2.984 \pm 0.04) \times 10^{-2}; ...
Marjorie Corcoran
(Rice U niversity)
05/07/2014, 09:30
Flavour Physics
Oral presentation
We present a measurement of the inclusive single muon charge asymmetry and the like-sign dimuon charge asymmetry in pp(bar) collisions using the full data set of 10.4 fb-1 collected with the D0 detector at the Fermilab Tevatron. The measurements differ from the standard modelpredictions of CP violation in these asymmetries with a significance of 3.6 standard deviations. These results are...
Dr.
Tadashi Nomura
(KEK)
05/07/2014, 09:45
Flavour Physics
Oral presentation
J-PARC-E14/KOTO experiment aims at observation of the rare decay KL->pi0nunu using a neutral kaon beam in the Hadron experimental hall at J-PARC. This mode occurs through a flavor-changing neutral current and violates CP symmetry. The branching ratio is calculated in the Standard Model (SM) to be 2.4x10^(-11). Since the theoretical uncertainty is small (~2%), this can be a good probe to...
Dr.
eryk czerwinski
(LNF (Frascati, Italy))
05/07/2014, 10:00
Flavour Physics
Oral presentation
The KLOE experiment at the DA$\Phi$NE $\phi$-factory of the INFN
Frascati Laboratory collected data corresponding to 2.5 fb$^{−1}$ of
integrated luminosity.
Neutral kaon pairs produced in phi-meson decays offer a unique possibilità to perform tests of fundamental discrete symmetries. The entanglement of the two kaons is exploited to search for possible violation of CPT symmetry and...
Prof.
Chung Kao
(University of Oklahoma)
05/07/2014, 10:15
Flavour Physics
Oral presentation
We adopt a general two Higgs doublet model to study flavor changing neutral Higgs interactions at the LHC.
We focus on the production of a heavy Higgs boson (H) decaying into a top quark and a charm quark with the final state of b c\ell\nu.
In the decoupling limit with a SM-like Higgs scalar (h),
the production (gg \to H) and decay (H \to tc) of H can be sustained by sin(\beta-\alpha) that...
Dr.
Miguel Nebot
(U. of Valencia - IFIC)
05/07/2014, 10:30
Flavour Physics
Oral presentation
Relevant constraints and selected phenomenological implications of a
class of two Higgs doublet models where flavour-changing neutral
currents (FCNC) couplings are suppressed by small entries of the mixing
matrix are analysed. This property of the considered models is the
result of a discrete symmetry of the Lagrangian such that the FCNC are
completely fixed, in the quark sector, by the...
Mirco Dorigo
(EPFL)
05/07/2014, 10:45
Flavour Physics
Oral presentation
An essential ingredient of all time-dependent CP violation studies of B mesons is the ability to tag the initial flavour of the B meson. The harsh environment of 7 and 8 TeV pp collisions makes this a particularly difficult enterprise. We report progresses in the flavour tagging of B0 and Bs mesons.
Mr.
Robin Glattauer
(HEPHY Vienna)
05/07/2014, 11:30
Flavour Physics
Oral presentation
Semileptonic B meson decays, $B \to X \ell \nu$, are currently the preferred modes for determining the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements $|V_{cb}|$ and $|V_{ub}|$, two fundamental parameters of the Standard Model. At the same time they can also be used to test and refine the theoretical tools used for describing B mesons and their decays. Purely leptonic B meson decays, $B \to...
Dr.
Kristopher Healey
(University of Turin)
05/07/2014, 11:45
Flavour Physics
Oral presentation
We perform a new fit to the moments of various kinematic distributions of inclusive semileptonic B decays, including recently computed higher order effects, and extract Vcb and the parameters of the heavy quark expansion.
Dr.
Brian Hamilton
(University of Maryland)
05/07/2014, 12:00
Flavour Physics
Oral presentation
LHCb has recorded large samples of semileptonic decays of c- and b-flavoured hadrons. We review the latest results in semileptonic decays of B, Bs and Λb decays. Recent results on CP violation and determination of CKM matrix elements are shown.
Andrea Alberti
(University of Turin)
05/07/2014, 12:15
Flavour Physics
Oral presentation
We review the status of the calculation of higher order corrections to inclusive
semileptonic B decays, with emphasis on recent developments concerning the perturbative corrections to power suppressed effects and their impact on the determination of Vcb.
Dr.
Thomas Lück
(University of Victoria)
05/07/2014, 12:30
Flavour Physics
Oral presentation
The experimental knowledge of semileptonic B decays to a D or D* meson with one or more pions is limited. These limitations are relevant to two experimental puzzles: the tension between the values of Vcb determined from inclusive and exclusive semileptonic decays, and the gap between the sum of the exclusive semileptonic B decays to charm and the inclusive b -> c l nu rate. The full BABAR...
Dr.
Arantza Oyanguren
(IFIC- Valencia)
05/07/2014, 12:45
Flavour Physics
Oral presentation
The charm semileptonic decay $D \to \pi e \nu$ has been measured by several experiments. Conversely to other semileptonic decays, this channel presents the interest that contributions from the two first poles can be predicted. We have computed accurately in LQCD the ratio of decay constants $f_{D^\ast}/f_D$ making the evaluation of the $D^\ast$-pole contribution quite accurate. Measurements of...
Mr.
Sascha Turczyk
(University of Mainz)
05/07/2014, 13:00
Flavour Physics
Oral presentation
There exist a long standing tension among determinations of the CKM matrix element $|V_{ub}|$ from various (semi)leptonic $B$ decay channels with varying significance of up to $\sim 3\sigma$. An interesting possibility to ease this tension is to allow for a right-handed contribution to the standard model left-handed weak current mediating the $b\rightarrow u$ quark decay. The current bounds on...
Mr.
Luis Pesantez
(University of Bonn)
05/07/2014, 15:00
Flavour Physics
Oral presentation
The radiative B decays proceed through a loop diagram and are sensitive to New Physics. We perform measurements of the branching fraction of $B \to X_s \gamma$, where $X_s$ is the hadronic state with strangeness. Using a semi-inclusive method in which $X_s$ is
reconstructed with 38 exclusive modes, the inclusive branching fraction in $M_{X_s} < 2.8$ GeV is measured. We also report the...
Dr.
Eugeni Grauges
(U. de Barcelona (UB))
05/07/2014, 15:15
Flavour Physics
Oral presentation
In b -> s gamma transitions, the standard model predicts that B0 (antiB0) decays are related predominantly to the presence of right (left) handed photons in the final state. Therefore, the mixing-induced CP asymmetry in B -> fCP decays, where fCP is a CP eigenstate, is expected to be small. This prediction may be altered by new-physics (NP) processes in which opposite helicity photons are...
Prof.
Ahmed Ali
(DESY)
05/07/2014, 15:30
Flavour Physics
Oral presentation
We present a precise calculation of the dilepton invariant-mass spectrum and the decay rate for B±→π±ℓ+ℓ− (ℓ±=e±,μ±) in the Standard Model (SM) based on the effective Hamiltonian approach for the b→dℓ+ℓ− transitions. With the Wilson coefficients already known in the next-to-next-to-leading logarithmic (NNLL) accuracy, the remaining theoretical uncertainty in the short-distance contribution...
Prof.
Gerald Eigen
(University fo Bergen)
05/07/2014, 15:45
Flavour Physics
Oral presentation
We use the large dataset collected with the BABAR detector to measure the branching fractions and CP asymmetries of the inclusive decays B -> Xs l+ l- and B -> Xs gamma. We adopt a sum-of-exclusive-states method, whereby 20 different final states are selected.
The branching fraction and CP asymmetry for B -> Xs l+ l- are measured in intervals of q2 (di-lepton invariant mass) and also in bins...
Dr.
Kajari Mazumdar
(TIFR - EHEP, India)
05/07/2014, 16:00
Flavour Physics
Oral presentation
Measurements of rare B meson decay properties provide an alternative approach to direct searches for physics beyond the Standard Model. These decays, which proceed through flavor-changing neutral currents, can have interferences from new physics through loop diagrams. In particular, the angular distribution of the decay B to K(*) mu+mu- can be measured as a function of the square of the dimuon...
Dr.
Paolo Iengo
(CERN)
05/07/2014, 16:15
Flavour Physics
Oral presentation
The large amount of Heavy Flavor data collected by the ATLAS experiment is potentially sensitive to New Physics, which could be evident in processes that are naturally suppressed in the Standard Model. The most recent results on the search for the rare decay Bs (B0) -> mu+mu- are presented, as well as results of the angular analysis of the semileptonic rare decay Bd → K*0 mu+mu- ->...
Dr.
Lars Hofer
(IFAE Barcelona)
05/07/2014, 16:30
Flavour Physics
Oral presentation
The exclusive decay B-->K^* mu mu has gained a lot of attention
because the recent LHCb angular analysis has indicated significant
deviations from the Standard Model which could be interpreted as a possible first signal of new physics. The sensitivity of theory
predictions to hadronic input parameters can be minimized be choosing
an optimized set of observables. On the other hand,...
Prof.
et al. D0 Collaboration
(Fermi National Accelerator Laboratory)
05/07/2014, 16:45
Flavour Physics
Oral presentation
We present new lifetime measurements of B mesons, using 10.4 fb-1 of proton-antiproton collisions collected by the D0 detector during Run II at the Fermilab Tevatron Collider. We report an update of the B_s^0 lifetime in semi-inclusive flavor-specific decays B_s^0 -> mu nu D_s X (and charge conjugate). We account for the missing energy from the neutrino and other possible undetected decay...
Dr.
Jibo HE
(CERN)
05/07/2014, 17:00
Flavour Physics
Oral presentation
Electroweak penguin b-hadron and c-hadron decays are very sensitive to physics beyond the Standard Model. Recent LHCb measurements have shown indications of large unexpected asymmetries in B→K*μμ and the first observation of the photon polarisation in b→sγ decays. We report the most recent LHCb results in this sector.
Dr.
Nuno Leonardo
(Purdue University / LIP)
05/07/2014, 17:15
Flavour Physics
Oral presentation
Rare beauty meson decays B_s,d to mu+mu- are searched in pp collisions at LHC using a data sample collected by the CMS experiment. These decays are highly suppressed in the standard model. They can only proceed through the flavor-changing neutral currents, which are forbidden at tree-level diagrams. These decays are an excellent probe of new physics: any difference between the measured...
