Thomas Mannel
(Siegen University)
07/04/2015, 11:05
Planary Talk
I will review a few recent result in the field of semileptonic decays of bottom and charm hadrons, including both exclusive as well as inclusive decays.
Dr
Kristopher Healey
(Università di Torino)
07/04/2015, 11:28
Planary Talk
Including the recently computed O(α ΛQCD^2}/mb^2) corrections, we perform an extraction of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vcb and the most relevant parameters of the heavy quark expansion from the data of inclusive semileptonic B decays. Using a recent determination of the charm quark mass, we obtain |Vcb|=(42.21±0.78)×10^{-3} and the bottom quark mass in the...
Javier Virto
(Universitat Siegen)
07/04/2015, 11:51
Planary Talk
Three body non-leptonic decays of B mesons have been studied at B factories and at the LHC, and will become a benchmark for flavor and CP studies at Belle II. I will discuss the QCD properties of three body hadronic B decays in the different regions of phase space and their interconnection, matching the different factorization descriptions in each regime, in an attempt to reconstrunct the...
Robert Fleischer
(CERN)
07/04/2015, 12:14
Planary Talk
Measurements of CP violation in $B^0_d\to J/\psi K_{\rm S}^0$ and $B^0_s\to J/\psi \phi$
decays play key roles in testing the quark-flavour sector of the Standard Model. The
theoretical interpretation of the corresponding observables is limited by uncertainties from
doubly Cabibbo-suppressed penguin topologies. With continuously increasing experimental
precision, it is mandatory to get a...
Alan Schwartz
(University of Cincinnati)
08/04/2015, 16:30
Planary Talk
We review recent results in heavy flavor decays from the Belle
, BaBar,
and LHCb experiments. These measurements range from mixing
parameters
to CKM phases to various observables in electroweak penguin
decays. The
results are sensitive to new physics and thus constrain exte
nsions to the Stan-
dard Model. Several inconsistencies between measured valu
es and Standard
Model...
Alexander Khodjamirian
(University of Siegen)
08/04/2015, 16:58
Planary Talk
I will present new results
on the theory of the rare flavour-changing neutral-current
decay $B\to \pi\ell^+\ell^-$ in the region of large recoil of the pion.
Nonlocal hadronic effects
in this decay are treated in a systematic way, combining QCD calculation with hadronic
dispersion relation including the vector meson contributions.
The effective addition to the Wilson coefficient $C_9$...
Roman Zwicky
(edinburgh university)
08/04/2015, 17:21
Planary Talk
I will discuss recent progress on B->V form factors. This will for instance include the use of the equation of motion in reducing the uncertainty of tensor-to-vector form factors.
The latter is of primary importance for the zero crossing of helicity amplitudes which has major impacts on angular observables. I will discuss the impact of cc-resonances on
determination of angular observables.
Sebastian Jaeger
(University of Sussex (GB))
08/04/2015, 17:44
Planary Talk
I will discuss the problems and opportunities in disentangling SM and BSM effects in
rare semileptonic and radiative decays, including electronic final states and
lepton universality-violating observables. I will contrast SM and BSM
effects in the context of (i) the LHCb anomaly, (ii) the search for right-handed
currents, and (iii) lepton-universality violation.
Wolfgang Altmannshofer
(Perimeter Institute)
09/04/2015, 14:30
Planary Talk
I will present results of global fits of all relevant experimental data on rare b-->s decays. Significant tensions between the Standard Model predictions and the data are observed that could be explained by unexpectedly large hadronic effects or by new physics.
Assuming hadronic uncertainties are estimated in a sufficiently conservative way, I will discuss the implications of the experimental...
Gudrun Hiller
(Technische Universitaet Dortmund (DE))
09/04/2015, 14:53
Planary Talk
Lepton-nonuniversality in rare b decays provides opportunities to
diagnose BSM physics at the weak scale. We discuss correlations
and give directions for flavor patterns in model-specific realizations with leptoquarks.
Marco Nardecchia
09/04/2015, 15:16
Planary Talk
I will discuss the possibility to explain recent anomalies in semileptonic B decays at LHCb via a composite Higgs model, in which both the Higgs and a triplet leptoquark arise as pseudo-Goldstone bosons of the strong dynamics. Fermion masses are assumed to be generated via the mechanism of partial compositeness, which largely determines the leptoquark couplings and implies non-universal lepton...
Avelino Vicente
(Université de Liège)
09/04/2015, 15:39
Planary Talk
The LHCb collaboration has recently reported on some anomalies in $b
\to s$ transitions. In addition to discrepancies with the Standard
Model (SM) predictions in some angular observables and branching
ratios, an intriguing hint for lepton universality violation was
found. Here we propose a simple model that extends the SM with a dark
sector charged under an additional $U(1)$ gauge...
Martin Jung
(TU Dortmund)
10/04/2015, 09:00
Planary Talk
We investigate the constraints on Two-Higgs-Doublet Models stemming from precision measurements of tree-level decays. We focus on leptonic and semileptonic meson decays, but also consider bounds from recent searches at ATLAS and CMS.
Ivan Nisandzic
(TU Dortumd)
10/04/2015, 09:23
Planary Talk
Current experimental information on the charm meson decay observables in which the $c\to s\ell\nu_\ell$ transitions occur is well compatible with the Standard Model (SM) predictions. Recent precise lattice calculations of the $D_s$ meson decay constant and form factors in $D \to K \ell\nu$ decays offer a possibility to search for the small deviations from the SM predictions in the next...
Alexey Petrov
(Wayne State University)
10/04/2015, 09:46
Planary Talk
Lepton flavor-violating processes offer interesting possibilities to probe new physics at multi-TeV scale. We discuss those in the framework of effective field theory, emphasizing the role of gluonic operators. Those operators are obtained by integrating out heavy quarks that are kinematically inaccessible at the scale where low-energy experiments take place and make those experiments...
Ulrich Nierste
(Karlsruhe Institute of Technology (KIT))
10/04/2015, 10:09
Planary Talk
The standard way to measure the CP phases $2\beta$ and $2\beta_s$ uses $B_{d,s}$ decays into charmonium. The theoretical precision is limited by the unknown penguin contribution to the decay amplitude. I show that this contribution can be expressed in terms of the same matrix elements which
constitute to the dominant tree amplitude. The second part of my talk
addresses a global analysis of D...
