Dr
Matthew Wingate
(University of Cambridge)
18/07/2013, 09:00
Flavour Physics and Fundamental Symmetries
Talk presentation
I will give a brief summary of lattice QCD calculations which have an impact on precision heavy flavour physics, focusing on the present status and future outlook.
Dmitri Melikhov
(M. V. Lomonosov State University)
18/07/2013, 09:15
Flavour Physics and Fundamental Symmetries
Talk presentation
We demonstrate that Borel QCD sum rules for heavy-light currents yield a very strong correlation between the b-quark mass and the resulting decay constant of the B-meson. This opens the possibility of an accurate determination of the b-quark mass from the sum rule using the values of fB and fBs as inputs. Combining recent accurate lattice QCD determinations of fB and fBs with our sum-rule...
Thomas Ruf
(CERN)
18/07/2013, 09:30
Flavour Physics and Fundamental Symmetries
Talk presentation
LHCb has recorded large samples of semileptonic B decays. These provide potential to study CP violation effects in the B0 and Bs0 systems. Decay time-integrated or time-dependent asymmetries between charge-conjugate final states probe CP violation in B(s)0 mixing through the measurement of the parameter Afs (sometimes referred to as Asl). These measurements rely on data-driven techniques...
Aleksey Sibidanov
(Budker Institute of Nuclear Physics (BINP))
18/07/2013, 09:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We present measurements of exclusive and inclusive semileptonic $B_s$ decays using 121 $\rm{fb}^{-1}$ of data collected with the Belle detector near the $\Upsilon(5S)$ resonance. The inclusive branching fraction ${\cal B}(B_s \to X^- \ell^+ \nu_\ell)$ is measured in a sample enhanced in $B_s^{(*)0}\bar{B}_s^{(*)0}$ pair events by reconstructing a tag $D_s^+$ meson. The signal lepton $\ell^+ =...
Florian Bernlochner
(Stanford)
18/07/2013, 10:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We report on recent results of studies of semileptonic B
decays with the BaBar detector.
In particular, we discuss the determination of |Vub| and
|Vcb| from both recent exclusive and inclusive measurements.
These include the measurement of the exclusive
B -> pi/eta/eta'/omega l nu decays with tagged and
untagged event reconstruction, the study of the q^2 and lepton
energy...
Riccardo Fantechi
(Sezione di Pisa (IT))
18/07/2013, 10:15
Flavour Physics and Fundamental Symmetries
Talk presentation
A lepton universality test by measurement of the helicity suppressed ratio RK of leptonic decay rates of the charged kaon has been performed by the NA62 experiment.
A precision measurement of the ratio RK of the rates of kaon leptonic decays
K+- to e+- nu and K+- to mu+- nu with the full minimum bias data sample
collected with low intensity 75 GeV/c beam by the NA62 experiment at CERN...
Giovanni Carboni
(Roma 2)
18/07/2013, 11:00
Flavour Physics and Fundamental Symmetries
Talk presentation
The latest years have seen a resurrection of interest in searches for exotic states motivated by tantalising observations by Belle and CDF. Using the data collected at pp collisions at 7 and 8 TeV by the LHCb experiment we present studies of the X(3872) properties as well as preliminary studies and prospects for studies of putative states such as the Z(4430)+.
Niels Tuning
(NIKHEF (NL))
18/07/2013, 11:15
Flavour Physics and Fundamental Symmetries
Talk presentation
Using the large data sample collected by the CERN LHCb experiment, we present studies of Bc mesons. The results include first observations of several new decay modes as well as high precision measurements of its properties.
Tomoko Iwashita
(Nara Women's Univ.)
18/07/2013, 11:30
Flavour Physics and Fundamental Symmetries
Talk presentation
It has been nearly ten years since the narrow $X(3872)$ state has been discovered in charged $B$ decays by the Belle experiment and its nature still remains unclear. To provide further insight on its properties, we report the search for the $X(3872)$ in the decays $B \to X(3872) K \pi$, $X(3872) \to J/\psi \pi^+ \pi^-$. The analysis is based on full data sample collected at the $\Upsilon(4S)$...
Pavel Krokovny
(Budker Institute of Nuclear Physics (RU))
18/07/2013, 11:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We report the results of a study of 352 million $\Upsilon(4S)$ decays in which the final state $\eta \Upsilon(1S)$ is observed. We observe two transitions, $\Upsilon(4S) \to \eta \Upsilon(1S)$ and $\Upsilon(1D) \to \eta \Upsilon(1S)$. The results on a search for $\chi_b (3P)$ spin triplet bottomonium states are presented as well. The data are produced by the KEKB $e^+e^-$ collider and...
Kai-Feng Chen
(National Taiwan University (TW))
18/07/2013, 12:00
Flavour Physics and Fundamental Symmetries
Talk presentation
The large production cross-sections at LHC energies, combined with a adapted
trigger strategy and good detector resolutions,
has enabled CMS to collect large data samples and to perform
detailed studies of Beauty hadron properties.
In this talk we will report our latest results,
including decay rate measurements from B hadrons, spectroscopy, and the
asymmetries arises from B mixing,...
John Baines
(STFC - Science & Technology Facilities Council (GB))
18/07/2013, 12:15
Flavour Physics and Fundamental Symmetries
Talk presentation
ATLAS has performed searches and accurate measurement of heavy hadrons, with results including the first observation of the chi_b(3P) Bottomonium states and the most accurate measurement of the Lambda_b lifetime. New results in this program are discussed, including searches for excited b-hadrons, and the study of parity violation in the decay Lambda_b into Lambda and J/psi.
Manuel Kambeitz
18/07/2013, 12:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We present a measurement of the properties of orbitally excited L=1 B mesons, using 10/fb of data collected by the CDF II detector. The masses, widths and relative production ratio times the branching fraction of the observed decays are determined for the two states B_1$ and B_2^*. The measurement is performed for excited B^0, B^+ and B_s mesons separately.
Liaoyuan Dong
(Institute of High Energy Physics),
liaoyuan dong
(ihep)
18/07/2013, 12:45
Flavour Physics and Fundamental Symmetries
Talk presentation
The BESIII experiment has collected the world's largest samples of J/psi, psi', psi(3770), Y(4260) and Y(4360) decays and is producing a large amount of results in charmonium, light hadron, open charm and XYZ physics. An overview of the most recent results on charmonium decays, D meson decays, light hadron spectroscopy, and searches for XYZ states will be given along with an outlook to the...
Adrian Bevan
(University of London (GB))
18/07/2013, 14:30
Flavour Physics and Fundamental Symmetries
Talk presentation
Time-dependent CP asymmetry measurements in D to h^+h^- decays, where h=pi or rho
can be used to constrain the angle beta_c of the cu unitarity triangle up to theoretical
uncertainties. Here we discuss the theoretical uncertainty from penguin contributions
that can be mitigated through the use of isospin analyses. We show that uncertainty from
penguin pollution on a measurement of beta_c...
Amarjit Soni
(BNL)
18/07/2013, 14:45
Flavour Physics and Fundamental Symmetries
Talk presentation
LHCb experiment over a year ago, opened up a new avenue to investigate the phenomena of CP violation via their first observation of direct CP asymmetry in $D^0 \to \pi^+ \pi ^-$ and to $K^+ K^-$.
This observation, though, presents a serious new challenge for theorists, as reliable, quantitative
calculations for D decays to hadronic final states are extremely difficult since the charm...
Stefan Schacht
(TU Dortmund)
18/07/2013, 15:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We give a comprehensive treatment of SU(3)$_F$ breaking in nonleptonic charm decays without theory bias aiming at a clean interpretation of CP-asymmetries including $\Delta A_{CP}$. We show how reasonable input from QCD factorization sharpens the SU(3)$_F$ fit.
Carla Gobel Burlamaqui De Mello
(Pontificia Universidade Catolica (BR))
18/07/2013, 15:15
Flavour Physics and Fundamental Symmetries
Talk 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. Preliminary measurements from several decay modes are presented, with complementary time-dependent and time-integrated analyses.
Byeong Rok Ko
18/07/2013, 15:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We report the measurements of mixing parameter $y_{CP}$, of a CP violating parameter $A_\Gamma$ and of a time integrated CP asymmetries $A_{CP}$ in decays $D^0 \to K^+ K^-$ and $\pi^+\pi^-$ using the Belle final data sample of 976 fb$^{-1}$.
Jonathan Lewis
(Fermilab)
18/07/2013, 15:45
Flavour Physics and Fundamental Symmetries
Talk presentation
The full CDF Run II data set, corresponding to an integrated luminosity of 9.3/fb of proton-antiproton collisions at 1.96 TeV, is used to measure the time-dependent ratio of decay rate for D0 -> K+ pi- to that for D0 -> K-pi+. The ratio is used to determine the mixing parameters R_D, x'^2, and y', and the significance of excluding the no-mixing hypothesis x' = y' = 0.
Ruslan Chistov
(Institute for Theoretical and Experimental Physics)
18/07/2013, 16:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We present a measurement of the rate for the doubly Cabibbo-suppressed decay $D^{0} \to K^+\pi^-\pi^+\pi^-$ relative to that for the Cabibbo-favored decay $D^0 \to K^-\pi^+\pi^-\pi^+$. The branching fractions are measured using 801 fb$^{-1}$ of data collected with the Belle detector at the KEKB collider.
Maxime Imbeault
(Cégep de Saint-Laurent)
18/07/2013, 16:45
Flavour Physics and Fundamental Symmetries
Talk presentation
It was recently shown that the weak phase $\gamma$ can be extracted from three-body B decays. Using a flavor-SU(3)-symmetric approach, we extract $\gamma$ from the BaBar measurements of the Dalitz plots of $B \to K\pi\pi$ and $B \to KK\bar K$ decays. We find four possible solutions: $31^{+2}_{-3}$, $77\pm3$, $258^{+4}_{-3}$ and $315^{+3}_{-2}$, in degrees. In all cases the error includes...
Paolo Gandini
(Syracuse University (US))
18/07/2013, 17:00
Flavour Physics and Fundamental Symmetries
Talk presentation
The angle γ of the CKM unitarity triangle remains the least precisely measured parameter of the CKM mixing matrix. The precision measurement of this parameter is one of the main goals of the LHCb experiment. We present a wide range of measurements of CP violation and partial rates in B→DK decays, as well as the latest LHCb measurement of γ combining all the individual inputs.
Kentaro Negishi
(Tohoku Univ.)
18/07/2013, 17:15
Flavour Physics and Fundamental Symmetries
Talk presentation
The neutral $B$-meson decay, $B^0\to D^*\pi$, provides a sensitivity to $\sin(2\phi_1+\phi_3)$, where $\phi_1$ and $\phi_3$ are the angles of the unitary triangle. There are two ways that the initial $B^0$ goes to a final state $D^{*-}\pi^+$. One is a Cabbibo-favoured decay (CFD) and the other is via $B^0 \to \bar{B}^0$ mixing followed by a doubly-Cabbibo-suppressed decay (DCSD). The former...
fedor ignatov
18/07/2013, 17:30
Flavour Physics and Fundamental Symmetries
Talk presentation
Regular data taking with the CMD-3 and SND detectors at the VEPP-2000 electron-positron collider in Novosibirsk is underway since 2010. The luminosity up to 10**31 cm-2s-1 has been reached at the energy 2E=2 GeV, and another order of magnitude will be achieved after construction of the new positron source.
The already collected physical data sample corresponds to about 36 inversed picobarns...
Alejandro Celis
(IFIC CSIC-Universitat de Valencia)
19/07/2013, 09:00
Flavour Physics and Fundamental Symmetries
Talk presentation
In this talk I will discuss the recent status of B to D(*) tau nu decays in the context of two-Higgs-doublet models. The BaBar collaboration has reported an excess in semileptonic b -> c tau nu transitions that has gathered recent interest as a possible signature of new physics. I will discuss the sensitivity of this decays to charged Higgs boson contributions, taking into account the...
Andreas Crivellin
(University Bern)
19/07/2013, 09:15
Flavour Physics and Fundamental Symmetries
Talk presentation
In this talk we show the effects of adding a second Higgs doublet to the SM particle content on flavour observables. After updating the constraints of the 2HDM of type II (which respects natural flavour conservation) we constrain the flavour structure of the 2HDM of type III (with general Yukawa coupling) from FCNC processes. Interestingly, respecting these constraints, sizable effects in...
Mr
Andrey Tayduganov
(ITEP Institute for Theoretical and Experimental Physics (RU))
19/07/2013, 09:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We discuss the possibilities for observing the new physics effects at low energies through a detailed analysis of the angular distribution of the decay products. In particular we find new observables that are accessible experimentally and that can be very useful in searches for the effects of physics beyond the Standard Model at low energies. We show the potential of this research on a...
Jan Hasenbusch
(Univ. of Bonn)
19/07/2013, 09:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We report the first branching fraction measurement of the inclusive Cabibbo favoured semileptonic decay $B\to X_c \tau\nu$ by the Belle experiment. The branching fraction of this kinematically suppressed mode is highly sensitive to new physics beyond the Standard Model, such as a charged Higgs, which couples strongly to the massive $\tau$ lepton and interfere with the Standard Model process....
Eli Ben Haim
(Centre National de la Recherche Scientifique (FR))
19/07/2013, 10:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We present the measurement of the B -> D(*) tau nu decay,
which is sensitive at tree level to New Physics in the form
of a charged Higgs Boson.
The measured branching fraction is 3.4 sigma larger than
the SM predictions, and excludes the 2HDM of type 2 at 99.88%
confidence for all tan(beta)/mHiggs values. Additional studies of
the momentum transferred to the lepton system show...
Fulvia De Fazio
(INFN - Sezione di Bari)
19/07/2013, 10:15
Flavour Physics and Fundamental Symmetries
Talk presentation
I will discuss a variant of the 331 model,a new Physics scenario in
which the gauge group of the SM is extended to SU(3)_C X SU(3)_L X U(1)_X.
As a main consequence, new sources of flavour and CP violation are
present that originate dominantly through the flavour violating
interactions of ordinary quarks
and leptons with a new heavy Zprime gauge boson.
I will focus on correlations...
Chun-Khiang Chua
19/07/2013, 11:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We study the implications of the experimental results on the \mu -> e\gamma decay rate and the muon anomalous magnetic moment, on muonic lepton flavor violating processes, such as \mu -> 3 e and \mu N -> e N. We use a model independent approach in this analysis, where these processes are considered to be loop induced by exchanging spin 1/2 and spin 0 particles. We explore two complementary...
Fabrizio Cei
(U)
19/07/2013, 11:15
Flavour Physics and Fundamental Symmetries
Talk presentation
We present recent results of the MEG experiment, which has been
searching for the Lepton Flavour Violating decay mu->e gamma since
several years. In a combined dataset corresponding to 3.6 x 10**14
stopped muons on target we didn't find any evidence for this decay
and we established an upper bound on the mu->e gamma branching ratio
of 5.7 x 10**(-13) at 90% C.L., which improves our...
Yusuke Uchiyama
(The University of Tokyo)
19/07/2013, 11:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We present the upgrade program of MEG experiment to search for the lepton-flavor-violating decay, mu to e gamma, aiming for a sensitivity enhancement of one order of magnitude compared to the final MEG result. The key feature of this program is to increase the rate capability of all detectors to enable running at more than twice higher beam intensity, which is the intensity frontier of DC muon...
Prof.
Roger Barlow
(MANCHESTER UNIVERSITY)
19/07/2013, 11:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We present a set of preliminary and final results on tau branching
fractions and invariant mass spectra, and a search for the second
class current decay tau -> pi eta'(958) nu_tau.
The results include new studies of a large number 3 and 5-prong
tau decay modes either inclusive or classified according the
hadronic resonance content (K0S, eta, omega, etc.).
All results are based on the...
Zdenek Dolezal
(Charles University (CZ))
19/07/2013, 12:00
Flavour Physics and Fundamental Symmetries
Talk presentation
B factories have successfully confirmed that the Standard Model with the CKM matrix offers a correct description of the quark weak
transitions and of CP violation. The next generation B factory (the so called super B factory) will search for New Physics effects
by looking for departures from the Standard Model predictions in precision measurements. For such studies, a 50 times larger data...
Andrzej Buras
(TU-Munich)
19/07/2013, 12:15
Flavour Physics and Fundamental Symmetries
Talk presentation
I will review detailed analyses of flavour violation in a number of
extensions of the Standard Model performed in 2012 and 2013.
In addition to various model independent patterns of flavour violation originating in tree-level FCNCs mediated by Z', Z and heavy scalars I will present the results in a Minimal Theory for fermion masses. Particular emphasis will be put on correlations ...
Masaya Kohda
(National Taiwan University)
19/07/2013, 14:30
Flavour Physics and Fundamental Symmetries
Talk presentation
The very rare B0_d --> mu+ mu- decay may be the last chance for New Physics in flavor sector at the LHC, before the 13 TeV run in 2015. Partially motivated by the known tension in sin(2beta/phi_1), enhancement beyond (3-4) x 10^-10 would likely imply the effect of a fourth generation of quarks. If observed at this level, the 126 GeV boson may not be the actual Higgs boson, while the b --> d...
Flavio Archilli
(Frascati-LNF)
19/07/2013, 14:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We present a review of the searches for very rare decays to muon final states performed at LHCb. Flavour changing neutral current processes, such as Bs→μ+μ– are highly suppressed in the Standard Model (SM). Such decays therefore allow the contributions from new processes or new heavy particles to significantly modify the expected SM rates. Charged lepton flavour violating processes (LFV),...
Urs Langenegger
(Paul Scherrer Institut (CH))
19/07/2013, 15:00
Flavour Physics and Fundamental Symmetries
Talk 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 to the new physics; any difference between the measured...
Jochen Schieck
(Ludwig-Maximilians-Univ. Muenchen (DE))
19/07/2013, 15:15
Flavour Physics and Fundamental Symmetries
Talk presentation
Evidence for New Physics signatures is searched in processes that are naturally suppressed in the Standard Model. Recent results on the angular distribution parameters AFB and FL describing the decay Bd -> K*mu+mu- -> K+pi-mu+mu- are presented. The accuracy obtained from data collected in 2011 is comparable to the best previous measurement in the region q^2(mu+mu-)>16 GeV^2.
New results on...
Mark Williams
19/07/2013, 15:30
Flavour Physics and Fundamental Symmetries
Talk presentation
The decay B_s -> mu mu is heavily suppressed in the standard model, but many scenarios for physics beyond the standard model predict large enhancements in this process. We report an updated search for this decay using data collected by the D0 detector at the Fermilab Tevatron collider. We use the full Run II data set, corresponding to approximately 10.4 fb-1 of integrated luminosity in p...
Bruce Hoeneisen
(Universidad San Francisco de Quito)
19/07/2013, 15:45
Flavour Physics and Fundamental Symmetries
Talk presentation
The DO Collaboration has published three measurements of the like-sign dimuon charge asymmetry in p-pbar collisions at the Fermilab Tevatron collider. The result is significantly different from the standard model prediction. We present the final measurement of this CP-violating asymmetry, using the full 10 fb^-1 of data collected during Run II, and discuss its possible interpretations.
Olga Kochebina
(Universite de Paris-Sud 11 (FR))
19/07/2013, 16:00
Flavour Physics and Fundamental Symmetries
Talk presentation
Flavour-changing neutral current decays such as c→ul+l– are highly suppressed in the Standard Model (SM), but may be enhanced by New Physics. For D0→μ+μ–, the SM decay rate is dominated by long distance contributions but is still a few order of magnitudes below the current experimental limit. In decays such as D+→π+μ+μ–, measuring the differential branching ratio as a function of the μ+μ–...
Evgenii Baldin
(BINP)
19/07/2013, 16:15
Flavour Physics and Fundamental Symmetries
Talk presentation
The ratio of the partial width of $J/\psi$ decays into $e^+e^-$ and $\mu^+\mu^-$ pairs are measured using a data sample of $7\cdot10^{6}$ \(J/\psi\) events recorded by the KEDR detector at the VEPP-4M collider. Our preliminary
result are:
\[\Gamma_{ee}/\Gamma_{\mu\mu}=0.9965\pm0.0045\pm0.0050.\]
Dr
Joaquim Matias
(Universitat Autonoma de Barcelona)
19/07/2013, 17:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We present a basis of observables to explore and extract all the information from the 4 body angular distribution B->K*(->Kpi)mu+mu- focusing on CP conserving and CP-violating observables at large and low recoil. We identify an optimal basis of observables that balances experimental and theoretical advantages, we present their SM predictions in all regions and discuss their complementarity in...
Danny van Dyk
(TU Dortmund)
19/07/2013, 17:15
Flavour Physics and Fundamental Symmetries
Talk presentation
We review the constraints on a subset of |Delta B| = |Delta S| = 1 Wilson coefficients from available data on rare radiative b->s gamma and (semi)leptonic b\to s\ell^+\ell^- decays. Specifically, we revisit
the benefits of a Bayesian global analysis in the form of correlated
posteriors of the Wilson coefficients and several hadronic quantities. Preliminary results are presented based on data...
Albert Puig Navarro
(Ecole Polytechnique Federale de Lausanne (CH))
19/07/2013, 17:30
Flavour Physics and Fundamental Symmetries
Talk presentation
Radiative B decays are sensitive probes of New Physics. We present the latest results on these decays from the LHCb experiment. Results include first measurements of new decay modes and studies that are sensitive to physics beyond the Standard Model that may affect the polarisation of the emitted photon in radiative B decays.
Nicola Serra
(Universitaet Zuerich (CH))
19/07/2013, 17:45
Flavour Physics and Fundamental Symmetries
Talk presentation
Rare b→sμ+μ– transitions that proceed via flavour changing neutral currents are suppressed in the SM and provide a sensitive probe of new physics contributions entering in competing diagrams. The dataset collected with the LHCb experiment has enabled measurements to be made in decays such as B→K*0μ+μ–, B+→K+μ+μ– and Bs→φμ+μ–. Particularly interesting are the angular and isospin asymmetries in...
Yutaro Sato
(Tohoku Univ.),
Yutaro Sato
(Nagoya University)
19/07/2013, 18:00
Flavour Physics and Fundamental Symmetries
Talk presentation
The charmless $B^0$ decay to $p \bar{\Lambda} \pi^- \gamma$ final state proceeds via the $b \to s \gamma$ radiative penguin process at the quark level and has never been observed. We present the result of the search for this decay using the full data sample collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider.
Fergus Wilson
(STFC - Science & Technology Facilities Council (GB))
19/07/2013, 18:15
Flavour Physics and Fundamental Symmetries
Talk presentation
We report on studies of B-meson decays via radiative or
electroweak penguin recently performed using the large
data set collected with the BaBar detector.
Sensitivity to New Physics is tested through measurements of
decay rates, rate asymmetries, and CP asymmetries, in several
b -> s gamma, b -> s l+l-, b -> d gamma, and b -> d l+l- processes.
Gianluca Lamanna
(Sezione di Pisa (IT))
19/07/2013, 18:30
Flavour Physics and Fundamental Symmetries
Talk presentation
The sensitivity of the NA62 experiment at CERN to charged kaon decays
violating lepton number conservation, neutral pion decays forbidden in the
Standard Model and heavy sterile neutrinos is discussed. These tests would probe new physics scenarios involving heavy Majorana neutrinos or R-parity violating SUSY.
An upper limit on the lepton number violating K+- to pi-+ mu+- mu+- decay rate...
Erika De Lucia
(Laboratori Nazionali di Frascati (LNF)-Istituto Nazionale Fisic)
19/07/2013, 18:45
Flavour Physics and Fundamental Symmetries
Talk presentation
The Ks --> 3pi0 decay is a pure CP violating process which, assuming
CPT invariance, allows direct CP violation to be investigated. This
decay has not been observed so far, and the best upper limit on the
branching ratio BR(KS --> 3pi0)< 1.2 10-7 is two orders of magnitude
larger than predictions based on the Standard Model. We present the
search for the Ks --> 3pi0 decay performed with...
Victor Egorychev
(ITEP Institute for Theoretical and Experimental Physics (RU))
20/07/2013, 09:00
Flavour Physics and Fundamental Symmetries
Talk presentation
The LHCb experiment is a forward arm spectrometer designed to make high precision measurements of b hadron decays at the LHC. LHCb's efficient dimuon trigger allows to perform studies of B mesons decaying to charmonia with high precision. We will present new measurements of the relative branching ratios of exclusive b decays to final states involving J/ψ and ψ(2S) mesons, together with other...
Roland Waldi
(Universitaet Rostock (DE))
20/07/2013, 09:15
Flavour Physics and Fundamental Symmetries
Talk presentation
Baryonic decays account for about 7% of the B-meson width,
and have been studied in recent years by the B factories.
These studies reveal properties of hadronization at low q^2,
such as s anti-s suppression known from jet fragmentation,
and phase space relations between the baryon and antibaryon.
The measurement and comparison of exclusive branching fractions
of baryonic B decays...
Stefano Perazzini
(Universita e INFN (IT))
20/07/2013, 09:30
Flavour Physics and Fundamental Symmetries
Talk presentation
Direct and mixing-induced CP violation observables in charmless charged two-body B decays may provide valuable information in the quest for physics beyond the Standard Model. Owing to the large beauty production cross-section at the LHC and to the unique characteristics of the LHCb detector and trigger, unprecedented samples of such decays are becoming available. We present updated...
James McCarthy
20/07/2013, 09:45
Flavour Physics and Fundamental Symmetries
Talk presentation
Charmless multibody B decays proceeding through the quark transitions
b → q qbar s(d) are relevant laboratories to study both direct and mixing-induced CP violation effects and to search for deviations from the Standard Model expectations. The dataset recorded by the LHCb experiment has been analysed to reconstruct B+, B0, Bs0 and Lambda_b decays into various multibody final states. We...
Michael Prim
(Karlsruhe Institute of Technology)
20/07/2013, 10:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We report results of an angular analysis and search for CP violation in the $B^0\to\phi (K^+\pi^-)^0$ decay. We perform a coherent amplitude analysis of the system up to an invariant mass of $1.55 \text{GeV}$ of the $(K^+\pi^-)^0$ pair. The analysis is based on a data sample of $772\times 10^6$ $B\overline{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB...
Justin Albert
(University of Victoria (CA))
20/07/2013, 10:15
Flavour Physics and Fundamental Symmetries
Talk presentation
The B decays to omega omega, and omega phi decays are
related to B -> phi K* via an SU(3) rotation.
The study of these yet unseen decay modes can therefore
provide information regarding the unexpectedly small value
of the longitudinal spin component (f_L) measured in
B -> phi K* decays.
We present the results of a new search for these decay modes,
as well as other charmless B...
Lars Eklund
(University of Glasgow (GB))
20/07/2013, 11:00
Flavour Physics and Fundamental Symmetries
Talk presentation
Precision measurements of b-hadron lifetimes are a key goal of the LHCb experiment. In the Bs0 sector, the measurement of the effective lifetimes for Bs0 mesons decaying to CP-odd, CP-even and flavour specific final states are essential for constraining the Bs0 mixing parameters, ΔΓs, the average width Γs and the CP-violating phase, φs. Measurements of b baryon lifetimes are also important to...
Sebastian Wandernoth
(Ruprecht-Karls-Universitaet Heidelberg (DE))
20/07/2013, 11:15
Flavour Physics and Fundamental Symmetries
Talk presentation
The study of CP violation in Bs oscillations is one of the key goals of the LHCb experiment. Effects are predicted to be very small in the Standard Model but can be significantly enhanced in many models of new physics. We present the world’s best measurement of the CP-violating phase φs using B0s → J/ψφ and B0s → J/ψππ decays, and first study of related measurements in other decay modes.
Dr
Mark Peter Whitehead
(University of Warwick (GB))
20/07/2013, 11:30
Flavour Physics and Fundamental Symmetries
Talk presentation
The LHCb experiment is a general purpose forward spectrometer operating at the Large Hadron Collider, optimized for the study of B and D hadrons. LHCb has collected unprecedented large samples of B hadron decays to final states involving charmed hadrons. These decays offer many complementary measurements of CP violation and CKM matrix parameters, and serve as a laboratory for testing effective...
Luka Santelj
20/07/2013, 11:45
Flavour Physics and Fundamental Symmetries
Talk presentation
Using 772 million B meson pair decays recorded by the Belle detector at the KEKB collider, we study the time-dependent CP violation in the penguin transitions $b \to s q \bar{q}$, specifically in $B^0 \to \eta' K^0$. The $K^0$ mesons are reconstructed by either $K^0_S$ and $K^0_L$ and the possible deviation of the CP-violating parameter $\sin2\phi_1^{\rm eff}$ from the value found in the...
Felicitas Thorne
20/07/2013, 12:00
Flavour Physics and Fundamental Symmetries
Talk presentation
We report result of search for $B_s^0 \to D_{s0}^*(2317)^- \pi^+$ decay using a 121.4 fb$^{-1}$ data sample collected at the $\Upsilon(5S)$ resonance with the Belle detector at the KEKB asymmetric $e^+e^-$ collider.
Pablo Villanueva Perez
(Unknown-Unknown-Unknown)
20/07/2013, 12:15
Flavour Physics and Fundamental Symmetries
Talk presentation
We present the observation of Time-reversal
asymmetry as well as a selection of recent results on
CP violation effects in B-meson decays using a data set
of about 500 fb-1, collected at the peak of the Y(4S)
with the BABAR detector at SLAC.
They include the measurements of processes sensitive
to the angles of the Unitarity Triangle.
Franco Simonetto
(Universita e INFN (IT))
20/07/2013, 12:30
Flavour Physics and Fundamental Symmetries
Talk presentation
We present the measurements of mixing-induced CP asymmetry in
semileptonic B-meson decays using the full data set collected
at the peak of the Y(4S), with the BABAR detector at SLAC.
The lepton charge directly identifies the B meson flavor in decays;
charged kaon is also used in tagging B meson flavor. Asymmetry
between B meson pairs decay as B0-B0 and B0bar-B0bar indicates
CP...
Mark Williams
20/07/2013, 12:45
Flavour Physics and Fundamental Symmetries
Talk presentation
We present results of the measurements of CP-violating parameters for a variety of b hadron species using the full Run 2 data set collected by the DØ detector. These include a new analysis testing for direct CP violation in B+ decays, and specific semileptonic charge asymmetries of B0s and B0 decays testing for CP violation in mixing.
