Samuel Coquereau
(Centre National de la Recherche Scientifique (FR))
23/07/2015, 09:00
Flavour Physics and Fundamental Symmetries
talk
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 BโK*ฮผฮผ and hints of lepton universality violation. Latest results involving new decay modes are presented.
Dr
Mauro Dinardo
(Universita & INFN, Milano-Bicocca (IT))
23/07/2015, 09:15
Flavour Physics and Fundamental Symmetries
talk
The Flavour Changing Neutral Current decay, B0 -> K*0 mu+mu-, is very sensitive to New Physics through its observables like A_FB (muon forward backward asymmetry), F_L (longitudinal polarisation of K*), and differential branching fraction. So far, these parameters are consistent with the Standard Model prediction. We will report the recent results from CMS on these parameters using the 20...
Ayan Paul
(INFN, Sezione di Roma)
23/07/2015, 09:30
Flavour Physics and Fundamental Symmetries
talk
The rare semileptonic B_d โ Kโฮผ+ฮผโ decay has been extensively studied within the Standard Model (SM) and beyond. In the last two releases, measurements provided by the LHCb experiment suggested a discrepancy found between the theoretical SM prediction and the experimental value of the angular observable Pโฒ5 at low q^2.
We critically reassess the theoretical uncertainties in the Standard...
Peter Stangl
(Excellence Cluster Universe, Munich)
23/07/2015, 09:45
Flavour Physics and Fundamental Symmetries
talk
We investigate whether
the $2.6\sigma$ deviation from lepton flavour universality
in $B^+\to K^+\ell^+\ell^-$ decays recently observed at the LHCb experiment
can be explained in minimal composite Higgs models.
We show that a visible departure from universality is indeed possible
if left-handed muons have a sizable degree of compositeness.
Constraints from $Z$-pole observables are avoided...
Javier Fuentes-Martin
(IFIC, Universitat de Valรจncia-CSIC)
23/07/2015, 10:00
Flavour Physics and Fundamental Symmetries
talk
Motivated by the $b\to s\ell^+\ell^-$ anomalies recently reported by the LHCb collaboration, I will present a class of flavored $\mathrm{U(1)}^\prime$ gauge extensions of the Standard Model that naturally accommodate them and present a rich phenomenology.
This class of models is characterized by the presence of tree-level flavor-changing $Z'$ couplings in the down-quark sector, protected by...
Paoti Chang
(National Taiwan University)
23/07/2015, 10:15
Flavour Physics and Fundamental Symmetries
talk
We will present new results on leptonic and radiative leptonic decays. Purely leptonic B meson decays, $B \to \ell \nu$, are helicity-suppressed in the Standard Model (SM), and while more challenging for the extraction of the CKM matrix element $|V_{ub}|$, they are excellent probes of models beyond the SM. The decay $B \to \ell \nu\gamma$ is not affected by this suppression and gives access to...
Pablo Ruiz Valls
(Instituto de Fisica Corpuscular (ES))
23/07/2015, 11:30
Flavour Physics and Fundamental Symmetries
talk
LHCb recently reported the first observation of a non-zero photon polarisation in bโฮณs decays. The interpretation of this result in terms of potential right-handed currents is still open. New results from the decays Bsโฯฮณ and B0โK0ee are presented.
Brais Sanmartin Sedes
(Universidade de Santiago de Compostela (ES))
23/07/2015, 11:45
Flavour Physics and Fundamental Symmetries
talk
Charmless B meson decays proceed via suppressed bโu tree and bโs,d penguin diagrams and are thus sensitive to New Physics. We present recent results on angular analyses of BโVV decays and searches for very suppressed decay modes.
Prof.
Leonard Lesniak
(Henryk Niewodniczanski Institute of Nuclear Physics PAS, Krakow, Poland)
23/07/2015, 12:00
Flavour Physics and Fundamental Symmetries
talk
Large CP-violating asymmetry effects in the
B+- --> K+- K+ K- decays have been predicted in the QCD factorization model [1].
The model includes strong K+ K- final-state long-distance interactions in the S-, P-, and also (in the recent analysis) D- wave two-body states.
The S-wave two-body unitarity conditions involve interchannel couplings of the kaon-kaon states with the intermediate...
Min-Zu Wang
(National Taiwan Univ.)
23/07/2015, 12:15
Flavour Physics and Fundamental Symmetries
talk
We present recent measurements of B mesons to 3-body hadronic final states. These measurements test factorization predictions, search for final-state interactions and measure strong interaction amplitudes using Dalitz-plot analysis techniques. The results employ the full Belle dataset and are our final measurements for these modes.
Chun-Khiang Chua
23/07/2015, 12:30
Flavour Physics and Fundamental Symmetries
talk
We study charmless two-body baryonic $B$ decays using the topological amplitude approach.
We extend a previous work to include all ground state octet and decuplet final states with full topological amplitudes. Relations on rates and CP asymmetries are obtained.
With the long awaited $\overline B^0\to p\bar p$ data, we can finally extract information on the topological amplitudes and predict...
MING-CHUAN CHANG
(FU JEN CATHOLIC UNIVERSITY)
23/07/2015, 12:45
Flavour Physics and Fundamental Symmetries
talk
Charmless decays of $B$ and $B_s$ mesons provide nice testing ground for the Standard Model (SM) and excellent probes for physics beyond the SM. The Belle experiment has produced many results in this subject by analyzing the high-statistics event sample of $B$ and $B_s$ meson decays. We present the searches for the two-body charmless rare decays $B^0\to \eta \pi^0$ and $B_s \to K^0 K^0$ using...
Andrea Mauri
(UZH)
23/07/2015, 14:30
Flavour Physics and Fundamental Symmetries
talk
Many models extending the SM to account for dark matter or explain inflation predict the existence of O(1) GeV mass particles with long lifetimes. LHCb's detection capabilities for detached vertices are exploited to search for particles decaying to muon pairs. New results are presented.
Riccardo Fantechi
23/07/2015, 14:45
Flavour Physics and Fundamental Symmetries
talk
A sample of 17 million fully reconstructed $\pi^0$ Dalitz decays produced in
charged kaon decays in flight collected by the NA48/2 experiment at CERN in
2003-04 is analysed to search for the dark photon ($A$) via the decay chain
$\pi^0 \rightarrow \gamma A$, $A \rightarrow e^+ e^-$.
No dark photon signal is observed, and the most stringent limits on the dark photon mixing parameter in the...
Greig Cowan
(University of Edinburgh (GB))
23/07/2015, 15:00
Flavour Physics and Fundamental Symmetries
talk
B mesons provides an ideal laboratory for measurements of CP
violation and searches for CPV beyond the Standard Model. Recent
measurements of the mixing phases of the $B_s$ and $B_d$ mesons,
$\phi_s$ and
$\sin{2 \beta}$, using decays to $J\Psi$X final states are presented.
In view of
future improved measurements, a good understanding of pollution from
sub-leading penguin topologies in...
Paula Eerola
(Dept of Physical Sciences, Univ. of Helsinki)
23/07/2015, 15:20
Flavour Physics and Fundamental Symmetries
talk
The study of CP violation in the decay channel Bs->Jpsi Phi is very important to explore physics beyond Standard Model in the quark flavour sector. The measurements of Phi_s and the decay width difference (Delta Gamma_s) are key parameters to look for BSM physics. We will report the recent results on these parameters using the 20 fb-1 data set collected in 2012.
Cristiano Alpigiani
(University of Washington, Seattle)
23/07/2015, 15:35
Flavour Physics and Fundamental Symmetries
talk
The large amount of Heavy Flavour data collected by the ATLAS experiment is potentially sensitive to New Physics, which may be found in the mixing of B meson states, or through processes that are naturally suppressed in the Standard Model. We present the new results on the measurement of the decay of the Bs into J/psi phi based on full data collected in LHC Run-1 and with updated flavour...
Philipp Frings
(Karlsruhe Institute of Technology)
23/07/2015, 16:30
Flavour Physics and Fundamental Symmetries
talk
The CKM angle $\beta$ ($\beta_s$) is one of the key $CP$-violation parameters in the SM. It is best
determined by the mixing-induced $CP$ asymmetry in the decay $B_d\to J/\psi K_S$ ($B_s \to J/\psi \phi$).
However, the theoretical precision of this determination has been under discussion for a long time and the
estimated uncertainties ranged from negligible to sizable.
The possible...
Basem Khanji
(Universita & INFN, Milano-Bicocca (IT))
23/07/2015, 16:45
Flavour Physics and Fundamental Symmetries
talk
The Bd meson oscillation frequency sets strong contraints on
the CKM matrix. A precision measurement using semileptonic decays is
presented.
Prof.
Sankagiri Umasankar
(Indian Institute of Technology Bombay)
23/07/2015, 17:00
Flavour Physics and Fundamental Symmetries
talk
In the time evolution of neutral meson systems, a perfect quantum
coherence is usually assumed. The important quantities of the $B^0_d$
system, such as $\sin 2 \beta$ and $\Delta m_d$, are determined under
this assumption. However, the meson system interacts with its environment.
This interaction can lead to decoherence in the entangled mesons even
before they decay. In our formalism this...
Tomonari Miyashita
(Caltech)
23/07/2015, 17:15
Flavour Physics and Fundamental Symmetries
talk
The asymmetry between same sign inclusive dilepton samples (l^+l^+ and l^-l^-) from semileptonic B decays in Upsilon(4S) -> B0 B0bar events allows us to compare the B0 mixing probabilities P(B0bar -> B0) and P(B0 -> B0bar), and hence to test T and CP invariance. We present a measurement of CP asymmetry in inclusive dilepton samples using the full BABAR dataset near the Upsilon(4S)...
Markus Roehrken
(California Institute of Technology)
23/07/2015, 17:30
Flavour Physics and Fundamental Symmetries
talk
We report on a time-dependent CP violation measurement of B0->D_CP($\star$)h0 decays, where the light neutral hadron h0 is a pi0, eta, or omega meson, and the neutral D meson is reconstructed in decays to two-body CP eigenstates K+ K-, K_S pi0, or K_S omega. The measurement is performed by combining the final data samples of 471 million BBbar pairs collected by the BABAR experiment and 772...
Iain Bertram
(Lancaster University)
23/07/2015, 17:45
Flavour Physics and Fundamental Symmetries
talk
We present the first search for exclusive CPT-violating effects in
the mixing of $B_s^0$ mesons using the full Run II data set with an integrated luminosity of 10.4 fb$^{-1}$ of proton-antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. We find no evidence for the CPT-violating effects tested and place limits on CPT- and Lorentz-invariance violating...
Marina Artuso
(Syracuse University (US))
24/07/2015, 09:00
Flavour Physics and Fundamental Symmetries
talk
The long standing discrepancies between the measurements of Vub and Vcb in inclusive and exclusive decays are still unresolved. LHCb recently reported the first observation of the baryon decay ฮbโpฮผฮฝ and the related measurement of Vub. Similarly, ฮbโฮcฮผฮฝ is used to constrain Vcb and the associated form-factors. Future prospected will also be presented.
Yuri Skovpen
(Budker Institute for Nuclear Physics)
24/07/2015, 09:15
Flavour Physics and Fundamental Symmetries
talk
The inclusive electron spectrum from B-meson decays is measured using a sample of 467 million BBbar pairs recorded with the BABAR detector. Contributions from CKM-favored and CKM-suppressed semileptonic B decays, from secondary decays of charm hadrons and from continuum e+e- -> qqbar annihilations are evaluated using a simultaneous fit to data collected at the Y(4S) resonance and at collision...
Arantza Oyanguren
(IFIC - Univers. de Valencia)
24/07/2015, 09:30
Flavour Physics and Fundamental Symmetries
talk
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 intervals of the four-momentum-transfer squared from D to pi using 347.2 /fb of integrated luminosity of the BaBar data. The D -> pi form factor is...
Robin Glattauer
(Institute of High Energy Physics Vienna)
24/07/2015, 09:45
Flavour Physics and Fundamental Symmetries
talk
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 the production of B mesons and their decays. Based on the large data...
Paolo Gambino
(universitร di torino)
24/07/2015, 10:00
Flavour Physics and Fundamental Symmetries
talk
The most precise determinations of Vub and Vcb come from semileptonic B decays. The results of the B factories, analysed in the light of the most recent theoretical calculations, are puzzling. For both Vcb and Vub the
determination based on exclusive channels is about 3ฯ below the one based on inclusive decays.
This discrepancy has survived several checks and may be an indication of new...
Marta Calvi
(Univ. degli Studi Milano-Bicocca)
24/07/2015, 10:20
Flavour Physics and Fundamental Symmetries
talk
The decay BโD*ฯฮฝ is sensitive to new physics and its rate exhibits a hint of deviation from the SM expectation. LHCb presents its first measurement of this mode.
Philipp Hamer
(Goettingen)
24/07/2015, 10:35
Flavour Physics and Fundamental Symmetries
talk
Semileptonic and leptonic B meson decays involving a heavy $\tau$ lepton are sensitive to new physics scenarios with an extended Higgs sector, such as the type-II two-Higgs-doublet model. Decays that have been studied at Belle include $B\to D^{(*)}\tau\nu$ , $B\to \tau\nu$ and $B\to \pi\tau\nu$. In this talk we report new and updated results for these modes, based on the large data sample...
Thomas Lueck
(SLAC)
24/07/2015, 10:50
Flavour Physics and Fundamental Symmetries
talk
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...
Andrzej Buras
(Munich)
24/07/2015, 11:30
Flavour Physics and Fundamental Symmetries
talk
After stressing the importance of kaon physics in searching for new physics I will briefly summarize the status of
the parameter $\epsilon$K in the standard model. The second part of my talk will be the presentation of new analyses of $K^+ \rightarrow \pi^+ \nu \bar{\nu}$ and $K_L \rightarrow \pi^0
\nu \bar{\nu}$ in the Standard Model and beyond. Finally, motivated by recent...
Prof.
George W.S. Hou
(National Taiwan University)
24/07/2015, 11:50
Flavour Physics and Fundamental Symmetries
talk
We do not violate the Grossman-Nir (GN) bound per se, but point out that the commonly perceived current GN bound of B(KL --> pi0 nu nu(bar)) < 1.4 x 10^-9 can be evaded, if a weakly interacting narrow state falls into the windows of kinematic exclusion of the K+ --> pi+ nu nu(bar) experiments. An explicit example is a Z' boson motivated by the muon g-2 anomaly and linked with flavor physics....
Vito Palladino
(CERN)
24/07/2015, 12:05
Flavour Physics and Fundamental Symmetries
talk
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...
Riccardo Fantechi
(INFN - Sezione di Pisa)
24/07/2015, 12:20
Flavour Physics and Fundamental Symmetries
talk
We report the first observation of the very rare decay K+- -> pi+- pi0 e+ e- by the NA48/2 experiment. From a clean sample of almost 2000 reconstructed signal events, we have determined the branching fraction with high precision and measured the e+ e- invariant mass distribution, which allows to differentiate between different decay models.
Dr
amarjit soni
(Brookhaven National Lab)
24/07/2015, 12:35
Flavour Physics and Fundamental Symmetries
talk
Recent publication [arXiv:1505.07863 by RBC and UKQCD Collaborations] of the first lattice QCD calculation of the complex kaon decay amplitude A0 with physical kinematics, using a single 323 x 64 domain wall ensemble is discussed. Approximate agreement with the experimental value for Re(A0) is obtained.. The calculated value of Im(A0) is used to...
Christoph Niehoff
(Excellence Cluster Universe, Munich)
24/07/2015, 12:50
Flavour Physics and Fundamental Symmetries
talk
We present an analysis of the rare exclusive $B$ decays $B\to K\nu\bar\nu$ and $B\to K^{\star}\nu\bar\nu$ within the Standard Model (SM), in a model-independent manner, and in a number of new physics (NP) models. Combining new form factor determinations from lattice QCD with light-cone sum rule results and including complete two-loop electroweak corrections to the SM Wilson coefficient, we...
Ayan Paul
(INFN, Sezione di Roma)
24/07/2015, 14:30
Flavour Physics and Fundamental Symmetries
talk
The question of the validity of analyzing charmed meson decays to pairs of hadrons within the SU(3) framework has been long and often debated. While there are convincing arguments that small breaking of this symmetry can accommodate for the current experimental results, the inability to compute QCD effects in these modes render it quite impossible to justify with complete authority the...
Michael Thomas Alexander
(University of Glasgow (GB))
24/07/2015, 14:45
Flavour Physics and Fundamental Symmetries
talk
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 DโKK and Dโฯฯ decays using the...
Maurizio Martinelli
(Ecole Polytechnique Federale de Lausanne (CH))
24/07/2015, 15:00
Flavour Physics and Fundamental Symmetries
talk
LHCb has collected the world's largest sample of charmed hadrons. Recently many searches for CP violation have focused on analysing the Dalitz phase space. New results and novel techniques are presented.
Denis Derkach
(University of Oxford (GB))
24/07/2015, 15:15
Flavour Physics and Fundamental Symmetries
talk
We update the analysis of D meson mixing including the latest
experimental results as of May 2015. We derive constraints on the parameters M12, Gamma12 and Phi12 that describe D meson mixing
using all available data, allowing for CP violation. We also provide posterior distributions for observable parameters appearing in D physics.
Liaoyuan Dong
(BESIII)
24/07/2015, 15:30
Flavour Physics and Fundamental Symmetries
talk
The BESIII Experiment at the Beijing Electron Positron Collider (BEPCII) has accumulated the world's largest samples of $e^+e^-$ collisions in the tau-charm region. Based on the samples taken at $\psi(3770)$ and $\psi(4010)$ peaks, we present the purely leptonic and semi-leptonic decays of D meson, the Dalitz analysis of $D^+\to K_s \pi^+ \pi^0$ and $D^0\to K_sK^+K^-$, the $K^-\pi^+$ and...
Pit Vanhoefer
(MPI Munich)
24/07/2015, 15:45
Flavour Physics and Fundamental Symmetries
talk
We present recent CP violation studies in B decays sensitive to the interior angles of the unitarity triangle in the Kobayashi-Maskawa scheme, $\phi_2 (\alpha)$ and $\phi_3 (\gamma)$. In addition, we present an updated CP-asymmetry measurement in charm meson decays. All measurements are based on the high statistics data set accumulated by the Belle detector at the KEKB asymmetric-energy e+eโ collider.
Paride Paradisi
(U. di Valencia)
24/07/2015, 16:30
Flavour Physics and Fundamental Symmetries
talk
Lepton Flavour Violating (LFV) processes remain among the best candidates to unveil NP effects. In this talk, I summarize LFV predictions of well motivated NP scenarios and the perspectives of detecting LFV signals in ongoing and upcoming experiments.
Prof.
Dmitry Grigoriev
(Budker Institute of Nuclear Physics (RU))
24/07/2015, 16:50
Flavour Physics and Fundamental Symmetries
talk
Lepton flavour violation (LFV) is currently one of the most exciting branches of particle physics. The flavour violating process of the neutrinoless decay of a positive muon to a positron and a gamma is strongly suppressed in the Standard Model, hence it is a very sensitive probe of new physics beyond the Standard Model. The MEG experiment searches for this process at the Paul Scherrer...
Markus Roehrken
(Cal Tech)
24/07/2015, 17:05
Flavour Physics and Fundamental Symmetries
talk
The Mu2e Experiment at Fermilab will search for coherent, neutrinoless
conversion of muons into electrons in the field of a nucleus with a
sensitivity improvement of a factor of 10,000 over previous experiments.
Such a lepton flavor-violating reaction probes new physics at a scale
inaccessible with direct searches at either present or planned high energy
colliders. The experiment...
Hajime Nishiguchi
(KEK)
24/07/2015, 17:20
Flavour Physics and Fundamental Symmetries
talk
The COMET Experiment at J-PARC aims to search for the lepton-flavour violating (LFV) process of muon to electron conversion in a muonic atom, $\mu^{-}N \rightarrow \mathrm{e}^{-}N$, with a branching-ratio sensitivity of $6 \times 10^{โ17}$, which is 4 orders of magnitude better than the present upper limit.
Complemental searches for two kinds of muon LFV decay modes,...
Graziano Venanzoni
(INFN)
24/07/2015, 17:35
Flavour Physics and Fundamental Symmetries
talk
The anomalous magnetic dipole moment of the muon can be both measured and computed to very high precision, making it a powerful probe to test the standard model and search for new physics such as SUSY. The previous measurement by the Brookhaven E821 experiment found a ~3 standard deviation discrepancy from the predicted value. The new g-2 experiment at Fermilab will improve the precision by a...
Roger Barlow
(University of Manchester)
24/07/2015, 17:50
Flavour Physics and Fundamental Symmetries
talk
We present measurements of the branching fraction for the radiative tau leptonic decays: tau -> gamma l nu nubar, where the lepton is either a muon or an electron.ย The results are obtained from an analysis of the complete BABAR data-set consisting of 430 million tau-lepton pairs, corresponding to an integrated luminosity of 468 fb^-1, collected at the PEP-II asymmetric energy e+e- collider at SLAC.
Jordi Garra Tico
(University of Cambridge (GB))
25/07/2015, 09:00
Flavour Physics and Fundamental Symmetries
talk
The angle ฮณ is the least constrained parameter in the CKM unitarity triangle. Its determination in decays induced by tree-level bโc and bโu transitions is largely unaffected by potential new physics contributions. This allows for a consistency check of the unitarity triangle, but also of comparisons with ฮณ determinations from modes with loop-diagrams. LHCb' ฮณ combination for CKM 2014 already...
Wenbin Qian
(Centre National de la Recherche Scientifique (FR))
25/07/2015, 09:15
Flavour Physics and Fundamental Symmetries
talk
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 first observations of orbitally excited D mesons, measurements of their spin, mass and decay widths.
Fulvia De Fazio
(INFN Bari)
25/07/2015, 09:30
Flavour Physics and Fundamental Symmetries
talk
I discuss the predictions of models based on an extended gauge group on several rare B decays, focusing in particular on the correlations among flavour observables. Two cases are considered in details: models introducing a new Z' gauge boson and the Randall Sundrum model with custodial protection.
Dr
Bjorn Herrmann
(Unite Reseaux du CNRS (FR))
25/07/2015, 09:45
Flavour Physics and Fundamental Symmetries
talk
We present an extensive study of non-minimally flavour violating (NMFV) elements in the Lagrangian of the Minimal Supersymmetric Standard Model (MSSM). We impose a variety of theoretical and experimental constraints and perform a detailed scan of the parameter space by means of a Markov-Chain Monte-Carlo (MCMC) setup. To our knowledge, this represents the first study of several non-zero...
Guido Martinelli
(Scuola Int. Superiore di Studi Avanzati (IT))
25/07/2015, 10:00
Flavour Physics and Fundamental Symmetries
talk
During the last 15 years, B-physics facilities have been giving enormous contributions to the consolidation of the Standard Model (SM) in the flavour sector. New analyses flowing from the LHC experiments, in particular LHCb, are now providing unprecedented insights into CKM metrology and new evidences for rare decays. The CKM picture can be tested with great precision, and very precise SM...
Jaroslaw Pawel Wiechczynski
(Polish Academy of Sciences (PL))
25/07/2015, 10:20
Flavour Physics and Fundamental Symmetries
talk
The Belle II experiment at the SuperKEKB collider in Tsukuba, Japan, will start physics data taking in the year 2018 and aims at accumulating 50 ab$^{-1}$ of $e^+$ $e^-$ collision data, about 50 times the data set of the previous Belle experiment. The physics program provides simultaneous studies of a wide range of areas in $b$-quark, $c$-quark, $\tau$-lepton, two-photon, quarkonium and exotic...
Kai-Feng Chen
(National Taiwan University (NTU))
25/07/2015, 10:35
Flavour Physics and Fundamental Symmetries
talk
The LHC is entering into operation with an increased centre-of-mass energy of 13 TeV, and within the next 3 years of operations (Run2) the foreseen integrated luminosity delivered to CMS will be about 100 fb-1. The B hadron production cross section is expected to nearly double at this energy compared to Run1, thus potentially increasing by almost one order of magnitude the collected statistics...
Stephane Monteil
(Univ. Blaise Pascal Clermont-Fe. II (FR))
25/07/2015, 10:50
Flavour Physics and Fundamental Symmetries
talk
A possible long-term strategy for high-energy physics at colliders considers a tunnel of about 100 km circumference, which takes advantage of the present CERN accelerator complex.A possible first step of the project is high-luminosity $e^+ e^โ$ collider aimed at studying comprehensively the electroweak scale with centre-of-mass energies ranging from the $Z$ pole up to beyond the $t...
Hans Stroeher
(Forschungszentrum Juelich GmbH)
25/07/2015, 11:30
Flavour Physics and Fundamental Symmetries
talk
Permanent Electric Dipole Moments (EDM) of non-degenerate systems, e.g., leptons
(electron, muon, tau) and hadrons (neutron, proton), provide a unique opportunity to search for physics beyond the Standard Model (BSM). Since EDMs violate P-, T-, and (via CPT)
CP-symmetry they may also provide a solution to one of the biggest puzzles of contemporary physics and cosmology, i.e., the apparent...
Dr
Gertrud Konrad
(SMI Wien)
25/07/2015, 11:50
Flavour Physics and Fundamental Symmetries
talk
The newly established New Frontiers Group โNoMoS: Beyond the Standard Model Physics in Neutron Decayโ of the Austrian Academy of Sciences aims to search for traces of new physics in neutron beta decay with novel experimental techniques.
Precision measurements in neutron decay allow searching for physics beyond the Standard Model. An accuracy of $10^{-4}$ in the observables corresponds to...
Martin Simon
(Austrian Academy of Sciences (AT))
25/07/2015, 12:05
Flavour Physics and Fundamental Symmetries
talk
The formation of antihydrogen opens a new avenue toward precise matter-antimatter symmetry studies through atomic spectroscopy techniques. The ASACUSA collaboration is pursuing an experiment to measure the ground-state hyperfine splitting of antihydrogen in a polarized beam [1]. For hydrogen this transition has been measured in a beam and with a maser reaching a relative precision of 4 ร 10eโ8...
Bastian Maerkisch
(Universitรคt Heidelberg)
25/07/2015, 12:20
Flavour Physics and Fundamental Symmetries
talk
Neutron beta decay is an excellent system to study the charged weak interaction experimentally. The decay is precisely described by theory and unencumbered by nuclear structure effects. Observables are numerous correlation coefficients, spectra and the neutron lifetime. Precision measurements in neutron beta decay are used to investigate the structure of the weak interaction and to derive...
David Anthony Milstead
(Stockholm University (SE))
25/07/2015, 12:35
Flavour Physics and Fundamental Symmetries
A sensitive search for neutron-antineutron oscillations can provide a unique probe of some of the central questions in particle physics and cosmology: the energy scale and mechanism for baryon number violation, the origin of the baryon-antibaryon asymmetry of the universe, and the mechanism for neutrino mass generation. A remarkable opportunity has emerged to search for such oscillations with...
Gerald Eigen
(University of Bergen)
25/07/2015, 12:50
Flavour Physics and Fundamental Symmetries
talk
We present a measurement of the time-dependent CP asymmetry in the radiative-penguin decay B0 -> K_S pi+ pi- gamma, using a sample of 471 million BBbar events recorded with the BaBar detector at the PEP-II e+e- collider at SLAC.
We obtain the CP-violating parameters S and C in the decay, and, using new theoretical input, extract from them the time-dependent mixing-induced CP asymmetry,...
