45. Measurements of e+e− → π π J/ψ, π π hc, ωχ, γ X(3872) and observation of Zc(3900) and Zc(4020) with BES III
Andrzej Kupsc (Uppsala University)
8/25/14, 9:30 AM
We report a new measurement of the e+e− → π π J/ψ, π π hc, ωχ cross section, the observation of e+e− → γ X(3872), and the new observation of charged particles, Zc(3900) and Zc(4020), as well as theirs neutral particle. The results are very helpful to understand the properties XYZ states
Dr Roberto Mussa (INFN TORINO)
8/25/14, 10:00 AM
After a dozen of very lively years, the spectra of heavy quarkonia below thresholds are almost complete; the last system to be explored is the Bc meson. Since few years, most discoveries happened close to open flavor thesholds, and four quark systems have attracted interest as the new spectroscopy frontier. This review will cover the unresolved questions on conventional quarkonia, the links...
Dr Elisabetta Prencipe (IKP - Forschungszentrum Juelich)
8/25/14, 11:10 AM
One of the most intriguing puzzles in hadron spectroscopy are the numerous charmonium-like states observed in the last decade, including charged states that are manifestly exotic. Over the years BaBar has extensively studied these states in B meson decays, initial state radiation processes and two photon reactions. We report new and additional studies on some of these states performed...
Pavel Řezníček (Charles University Prague)
8/25/14, 11:40 AM
The production of Bc-meson has been studied by ATLAS in several exclusive channels containing a J/psi. We present results on its spectroscopy and the measurement of the B_c->J/psiD(*) decay branching ratio, including relative contribution of the different helicity amplitudes.
Peter Weidenkaff (Mainz University)
8/25/14, 12:10 PM
We perform an analysis of the D+ -> Ks pi+ pi0 Dalitz plot. The Dalitz plot is found to be well-represented by a combination of six quasi-two-body decay channels (Ks rho, Ks rho(1450), K*0bar pi+, K*0(1430)bar pi+, K(1680)bar pi+ and kapa0bar pi+) plus a small non-resonant component. Using the fractions from this analysis, partial branching ratios are updated with higher precision than...
Sascha Turczyk (University of Mainz)
8/25/14, 2:00 PM
An interesting possibility to ease the tension between various determinations of |Vub| allows a small right-handed contribution to the Standard Model weak current. The current bounds on such a contribution are fairly weak. We propose new ways to search for such a beyond Standard Model contribution in the semileptonic B -> ρ l ν decay. We suggest to use generalized asymmetries in one, two, or...
Jochen Dingfelder (University of Bonn)
8/25/14, 2:35 PM
Semileptonic B meson decays, B ➞ X l ν, are currently the preferred modes for determining the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements |Vcb| and |Vub|, 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. Based on the large data sample accumulated by the Belle...
Florian Bernlochner (Univ. of Victoria)
8/25/14, 3:05 PM
Daniel Cronin-Hennessy (Minnesota University)
8/25/14, 4:05 PM
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 include preliminary results of B(D0 -> K- e+ nu) , B(D0 -> pi- e+ nu), as well as the partial decay rates of these decays in q^2 bins. The measured partial decay rates, in return, allow us to determine different parameterizations of the form factors....
Daniel Scheirich (Charles University Prague)
8/26/14, 9:30 AM
The different amplitudes contributing to the decay of Bs into J/psi phi (mu+mu-K+K-) can be studies with a combined analysis of decay time and angular correlations. An updated analysis is presented, based on data collected in 2012 and with improved flavour tagging improving the accuracy in the CP-violating phase phi_s.
Dr Joerg Marks (Uni Heidelberg, Physikalisches Institut)
8/26/14, 10:00 AM
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
Jeremy Dalseno (University of Bristol)
8/26/14, 11:00 AM
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 of large CP...
Jeremy Dalseno (Bristol University)
8/26/14, 11:30 AM
The LHCb experiment has a great potential for precise measurements of the CP violating phase in the standard model, and for searches of new phases. We report on recent measurements of the CP violating angle angle γ which is the least constrained parameter in the CKM unitarity triangle, the phase in B mixing, and direct CP violation in B decays.
Maura pavan (Dipartimento di Fisica Università di Milano Bicocca)
8/26/14, 2:00 PM
While neutrino oscillation experiments have finally provided the incontrovertible evidence that neutrinos mix and have finite masses the absolute scale and ordering of the masses of the three generations as well as charge conjugation and lepton number conservation properties are still unknown. In this scenario, a unique role is played by the Neutrinoless Double Beta Decay searches: these...
Florian Fränkle (Karlsruhe Institute of Technology)
8/26/14, 2:25 PM
Experimental information about the neutrino masses and lepton mixing is important both for cosmology and particle physics. Cosmological observations and neutrinoless double beta decay experiments provide an indirect access to the absolute neutrino mass scale, but are model-dependent. A model independent, direct way to measure the neutrino masses is the investigation of the kinematics of single...
Stefano Davini (University of Houson)
8/26/14, 2:50 PM
The Sun as a well-defined neutrino source provides extremely important opportunities to investigate nontrivial neutrino properties such as nonzero mass, flavor mixing, neutrino oscillations, and MSW effect. The solar neutrino flux is energetically broadband, free of flavor backgrounds, and passes through quantities of matter obviously unavailable to terrestrial experiments. In this talk,...
Daniel Cronin-Hennessy (Minnesota University)
8/26/14, 3:15 PM
Accelerator neutrino experiments using intense beams of muon neutrinos provide a well-controlled window into the new physics of the PMNS sector which expands the conventional standard model. Long-baseline experiments are providing significantly improved precision on oscillation phenomena using matter effects, appearance and disappearance channels, and neutrinos and antineutrinos. Other...
Dr Antoine Collin (MPI für Kernphysik Heidelberg)
8/26/14, 4:10 PM
The θ13 parameter of the PMNS mixing matrix remained unknown until the first hints and estimates by both reactor and beam experiments in 2011. The most competitive limit set by the Chooz experiment let indeed open the hypothesis of a null value. A precise measurement of a non zero value enables a future observation of the CP violation and the estimate of its phase δ. The Double Chooz...
Jim Napolitano (Temple University)
8/26/14, 4:35 PM
The Daya Bay Reactor Neutrino Experiment measures the neutrino mixing angle θ_13 with high sensitivity, using functionally identical detectors at appropriate distances from the cores of a nuclear power plant. We have analyzed 217 days of data with six detectors, and 404 days with the full complement of eight detectors, obtaining a sample of over two million ν ̄ep → e+n events. Combining rate...
Prof. Michael Wurm (JGU Mainz/PRISMA)
8/26/14, 5:00 PM
While neutrino oscillations among the three active neutrino flavors are by now well established, several anomalies observed at relatively short baselines in oscillation experiments hint towards the existence of one or more additional sterile neutrino flavors. As a consequence, several experiments are in preparation that are dedicated to test the sterile neutrino hypothesis. The present...
Dmitri Madigozhin (JINR Dubna)
8/27/14, 9:30 AM
New final results from an analysis of about 400 K+- --> pi+- gamma gamma rare decay candidates collected by the NA48/2 and NA62 experiments at CERN during low intensity runs with minimum bias trigger configurations are presented. The results include a model-independent decay rate measurement and fits to Chiral Perturbation Theory (ChPT) description. The data support the ChPT prediction for a...
Aleksander Gajos (Jagiellonian University Cracow)
8/27/14, 9:55 AM
The KLOE experiment at the DAΦNE φ-factory of the INFN Frascati Laboratory collected data corresponding to 2.5 fb^−1 of integrated luminosity. Neutral kaon pairs produced in φ-meson decays offer unique possibilities to perform tests of fundamental discrete symmetries. The entanglement of the two kaons is exploited to search for possible violation of CPT symmetry and Lorentz invariance in...
Carla Marin Benito (Universitat de Barcelona)
8/27/14, 10:20 AM
Kaon decays are a new area of interest at the LHCb experiment. A search for the decay K0S -> mu+ mu- is performed, based on a data sample of 1.0 fb^-1 of pp collisions at sqrt(s) = 7 TeV. The observed number of candidates is consistent with the background-only hypothesis, yielding an upper limit of B(K0S -> mu+ mu-) < 11 (9) x 10^-9 at 95 (90)% confidence level. This limit is a factor of...
Steffen Strauch (University of South Carolina)
8/27/14, 11:15 AM
Experiment E36 at the Japan Proton Accelerator Research Complex will study the decay of stopped kaons to search for new physics beyond the Standard Model. In particular, the experiment aims to provide the most stringent test of lepton universality to date in a measurement of the ratio of the Ke2 and Kmu2 decay widths, and will simultaneously search for light new particles, such as a heavy...
Michal Koval (Comenius University Bratislava)
8/27/14, 11:40 AM
The rare decays K+ ->π+ ν ν 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 in...
Chris Parkinson (University of Birmingham)
8/27/14, 12:05 PM
Recent results and prospects for precision tests of the Standard Model in kaon decay in flight experiments at CERN are presented. A measurement of the ratio of leptonic decay rates of the charged Kaon at a 0.4% precision constrains the parameter space of new physics models with, for example, an extended Higgs sector. Searches for neutrino mass states and the dark photon in the ~100 MeV/c^2...
Marcin Chrzaszcz (University of Zurich)
8/28/14, 9:00 AM
Heavy Quarks & Leptons
The observation of neutrino oscillations has re-opened the case for searches of lepton-flavour violating decays. We report on recent results and prospects on lepton-flavour violating τ decays, as well as searches for short or long-lived Majorana heavy neutrinos in B→μμπ decays.
Nathan Kellams (University of Notre Dame)
8/28/14, 9:30 AM
Heavy Quarks & Leptons
Recent discovery of the Higgs boson presents a new portal to the study of lepton flavor violation. Since Higgs couples to mass, LFV in heavy leptons is especially interesting. We describe recent results from a CMS search for H decay to muon and tau pair.
Marcin Chrzaszcz (University of Zurich)
8/28/14, 10:00 AM
Heavy Quarks & Leptons
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, hints of lepton universality violation, and the first observation of the photon polarisation in b→sγ decays. We report the most recent LHCb results in this sector.
Susana Patricia Amor Dos Santos (LIP Lisbon, Coimbra University)
8/28/14, 11:00 AM
The top quark is the heaviest known fundamental particle. As it is the only quark that decays before it hadronizes, this gives us the unique opportunity to probe the properties of bare quarks. This talk will focus on a few recent precision measurements by the ATLAS Collaboration of the top quark: fiducial top pair and single top production cross sections including differential distributions...
Meyer Andreas (DESY)
8/28/14, 11:30 AM
Recent results on top quark properties and interactions are presented, obtained using data collected with the CMS experiment during the years 2011 and 2012 at 7 TeV and 8 TeV center-of-mass energy. Measurements are performed for the inclusive and differential top quark pair production cross sections in several top quark final states. The mass of the top quark is extracted using several...
Oleg Brandt (University of Heidelberg)
8/28/14, 12:00 PM
I present an overview of recent measurements by the D0 experiment in the top quark sector: the forward-backward asymmetry A_FB in tt production due to higher order effects of QCD, both inclusive and differential as a function of the mass of the ttbar pair, the differential tt production cross sections, the evidence for single top quark production in the s-channel, and, to conclude, the world's...
Tomasz Szumlak (University of Zurich)
8/29/14, 9:00 AM
The LHCb experiment is designed to perform high-precision measurements of CP violation and search for New Physics using the enormous flux of beauty and charmed hadrons produced at the LHC. The operation and the results obtained from the data collected do far demonstrate that the detector is robust and functioning very well. We therefore plan for an upgraded spectrometer by 2018 with a 40 MHz...
Daniel Cronin-Hennessy (University of Minnesota)
8/29/14, 9:30 AM
The NOvA experiment, now nearing completion, is a new long-baseline neutrino experiment that will use an upgraded NuMI neutrino source at Fermilab and a 14-kton detector at Ash River, Minnesota. NOvA uses a highly active, finely segmented detector design that offers superb event identification capability, allowing precision measurements of electron (anti-)neutrino appearance and muon...
Achim Stahl (RWTH Aachen)
8/29/14, 10:00 AM
I will explain the physics prospects of the JUNO experiment with a special emphasis on the determination of the mass hierarchy. Then I want to present the detector concept along with the ongoing R&D and our schedule.
Ryosuke Itoh (KEK)
8/29/14, 11:00 AM
The Belle II experiment is a new generation B-factory experiment at KEK in Japan. The construction of the SuperKEKB accelerator and the Belle II detector is now in progress aiming at the commissioning in 2016. In the conference, the physics motivation of the experiment, the search for New Physics in the enormous number of B meson and other decays, is discussed in detail with a view of...