Recent CP violation results from Belle

We summarize recent results on an array of CP violation measurements performed by the Belle experiment using the data collected near the Y(4S) and Y(5S) resonances at the KEKB asymmetric-energy e+e- collider.Comment: 8 pages, 5 postscript figures, contributed to the Proceedings of the Rencontres de Moriond EW 2012, La Thuile, Aosta valley, Ital

Looking for Exotica at the B Factories

Current experiments at the B factories, designed to perform precision measurements of matter-antimatter asymmetry in the B meson system, have a much broader physics reach especially in the sector of quarkonium spectroscopy. Here we present a minireview on the new charmonium-like states observed at the B factories including the X(3872) and Y(4260).Comment: 12 pages, 8 postscript figures, contributed to the Proceedings of the 17th DAE-BRNS High Energy Physics Symposium, IIT, Kharagpur, Indi

Alternative Scenarios for the Fragmentation of a Gluonic Lund String

The assumptions in the Lund model suffice to prescribe a unique stochastic process for the fragmentation of a string into a set of hadrons, so long as the string is "flat", ie as long as the state described by the string consists only of a quark and an antiquark stretching a constant force field between them. Emission of gluons causes the string to trace more complicated surfaces in Minkowski space, and some form of generalization of the 1+1 dimensional model is required. One such generalizaiotn has been developed and implemented as a Monte Carlo routine "JETSET" by Torbj\"orn Sj\"ostrand, which has been hightly successful in describing experimental data. But there are theoretical reasons to believe that the fragmentation scheme employed in JETSET is not entirely satisfactory; most notably, non-adherance to the Lund Area law, and certain problems in handling transverse momenta. A few alternative scenarios, which we have examined in detail and implemented in separate computer programs, will be presented here, with comparisons to JETSET in certain simple cases. Our effort has been to preserve the area law for the fragmentation of a gluonic string, while we explored the possibility of allowing the fragmentation process to reshape the string surface slightly.Comment: 7 pages, 3 figures, to appear in the Proceedings of the XXX'th International Symposium on Multiparticle Dynamics (Oct 9-15, 2000), Lake Balaton, Hungar

Exotic, LFV and LNV Decays at the B Factories

I review the latest results on exotic, lepton flavor violating (LFV) and lepton number violating (LNV) decays of the B, D mesons and the tau leptons, obtained at the two B-factory experiments, Belle and BaBar. Where appropriate, results from other experiments are also described.Comment: 8 pages, 5 figures, 2 tables, Proceedings of CKM2010, the 6th International Workshop on the CKM Unitarity Triangle, University of Warwick, UK, 6-10 September 201

Charmless Hadronic B Decays at BABAR

We report recent measurements of branching fractions and charge asymmetries of charmless hadronic B decays using the data collected with the BABAR detector at the PEP-II asymmetric energy e+e- collider.Comment: 7 pages, 4 postscript figures, 3 tables, contributed to the Proceedings of XII International Conference on Hadron Spectroscopy (HADRON07), Frascati, Ital

Charm at Belle II - Status and Prospects

High-precision flavor physics measurements play a complementary role to the direct searches for new physics by CMS and ATLAS experiments at LHC. Such measurements will be performed with the Belle II detector at the upgraded KEKB accelerator (SuperKEKB) in Japan. The physics potential with emphasis on the charm sector, current status and future prospects of the Belle II experiment are presented in these proceedings.Comment: 8 pages, 3 postscript figures, to appear in the proceedings of the 6th International Workshop on Charm Physics (CHARM 2013

Baryogenesis from primordial tensor perturbations

During inflation primordial quantum fluctuations of the spacetime metric become classical and there is a spontaneous CPT violation by the spin connection coupling terms of the metric with fermions. The energy levels of the left and the right chirality neutrinos is split which gives rise to a net lepton asymmetry at equilibrium. A net baryon asymmetry of the same magnitude can be generated from this lepton asymmetry either by a GUT, $B-L$ symmetry or by electroweak sphaleron processes which preserve $B+L$ symmetry. If the amplitude of the primordial tensor perturbations is of the order of $10^{-6}$ (as is expected from inflation models) and the lepton/baryon number violating processes freeze out at the GUT era $T_d \sim 10^{16} Gev$ then a baryon number asymmetry of the correct magnitude $10^{-10}$ can be generated.Comment: 9 pages Latex fil

CP violation and hints for new physics at the B factories

We report the latest results on CP violation measurements and the tantalizing hints of potential new physics effects obtained at the B factories.Comment: 10 pages, 6 postscript figures, contributed to the Proceedings of the 5th International Conference on Flavor Physics (ICFP09), Hanoi, Vietna

Baseline measures for net-proton distributions in high energy heavy-ion collisions

We report a systematic comparison of the recently measured cumulants of the net-proton distributions for 0-5\% central Au+Au collisions in the first phase of the Beam Energy Scan (BES) Program at the Relativistic Heavy Collider facility to various kinds of possible baseline measures. These baseline measures correspond to assuming that the proton and anti-proton distributions, follow Poisson statistics, Binomial statistics, obtained from a transport model calculation and from a hadron resonance gas model. The higher order cumulant net-proton data corresponding to the center of mass energies ($\sqrt{s_{NN}}$) of 19.6 and 27 GeV are observed to deviate from all the baseline measures studied. The deviations are predominantly due to the difference in shape of the proton distributions between data and those obtained in the baseline measures. We also present a detailed study on the relevance of the independent production approach as a baseline for comparison with the measurements at various beam energies. Our studies points to the need for a proper comparison of the experimental measurements to QCD calculations in order to extract the exact physics process that leads to deviation of the data from the baselines presented.Comment: 7 pages, 8 figures. The STAR experiment data for net-protons was obtained from the following web-link http://drupal.star.bnl.gov/STAR/files/starpublications/205/data.htm

A Fluctuation Probe of Disoriented Chiral Condensates

We show that an event-by-event fluctuation of the ratio of neutral pions or resulting photons to charged pions can be used as an effective probe for the formation of disoriented chiral condensates. The fact that the neutral pion fraction produced in case of disoriented chiral condensate formation has a characteristic extended non gaussian shape, is shown to be the key factor which forms the basis of the present analysis.Comment: 4 pages and 3 figure