8,437 research outputs found

    Îł/ϕ3\gamma / \phi_3 at hadron colliders

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    In the first part of the document I describe in a general way the Îł/ϕ3\gamma / \phi_3 extraction and compare the experimental environments. I then switch to the available results from the CDF experiment. In the third part I present early results from the LHCb experiment, which are promising first steps on the way to a future Îł/ϕ3\gamma / \phi_3 measurement.Comment: 12 pages, 4 figures, The Ninth International Conference on Flavor Physics and CP Violation (FPCP 2011) Maale Hachamisha, Israel, May 23--27, 201

    Future prospects at LHCb

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    The LHCb experiment is running at the Large Hadron Collider to study CP violation and rare decays in the beauty and charm sectors. The motivation and the strategy of the upgrade envisaged for the long shutdown LS2 (2018) is presented. The current results for some exemplary physics analyses are given and the expected performances foreseen for 2018 and for the LHCb Upgrade project with an integrated luminosity of 50 fb−1^{-1} are summarized.Comment: Proceedings of CKM 2012, the 7th International Workshop on the CKM Unitarity Triangle, University of Cincinnati, USA, 28 September - 2 October 201

    Heavy Flavours and CP Violation

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    Recent results on Heavy Flavours and CP violation are presented. After a short introduction a taste of K and D results is given. In a third part results on Vtd and Vts are summaryzed including BBbar mixing results and Bd radiative decays. A summary of Vcb and Vub measurements is presented in the fourth part. In the next section CP violation measurements in the Bd sector are shown. Finally in the last part the overall status of the determination of the CKM matrix is presented both in the context of the Standard Model and in the context of New Physics.Comment: Plenary talk at HEP200

    Overall determination of the CKM matrix

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    We discuss the problem of theoretical uncertainties in the combination of observables related to the CKM matrix elements and propose a statistically sensible method for combining them. The overall fit is performed on present data, and constraints on the matrix elements are presented as well as on fB*sqrt(Bb). We then explore the implications of recent measurements and developments: jpsi-KS CP asymmetry, epsilon_prime/epsilon and B -> K pi branching fractions. Finally, we extract from the overall fit the Standard Model expectations for the rare kaon decays K -> pi nu anti-nu.Comment: Talk given at Heavy Flavours 8, Southampton, UK, 199

    Feasibility study for a model independent measurement of 2ÎČ+Îł\beta + \gamma in B0B^0 decays using D−K0π+D^- K^0 \pi^+ final states

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    In this paper we present a feasibility study for measuring the combination of the Unitarity Triangle angle 2ÎČ+Îł\beta +\gamma with a time dependent Dalitz analysis in B0B^0 decays using D−K0π+D^- K^0 \pi^+ final states following the method proposed in [1]. For this study we build a model for this decay using the latest experimental information and we investigate the possibility of fitting together with 2ÎČ+Îł\beta +\gamma all the relevant strong amplitudes and phases of the decay model. [1] R. Aleksan, T.C. Petersen and A. Soffer, Phys. Rev. D67 (2003) 096002 [hep-ph/0209194].Comment: 14 page

    Physics results from BABAR and prospects

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    The BABAR experiment has been taking data since about one year. Physics results, complementary to those described by G.Sciolla elsewhere in these Proceedings, are presented: various measurements of the neutral and charged B mesons lifetimes, the B^0 mixing frequency, the mistag fractions, and the B --> D_s^(*) X and B^0 --> D_s^(*)+ D^* branching ratios. Some prospects for the close future are shown. All the numbers given here are preliminary.Comment: 12 pages, 12 postscript figures, contributed proceedings of the International Conference On CP Violation Physics, 9/18-22/2000, Ferrara, Ital

    Search for new physics at LHCb: rare decays of B hadrons and CP violation in the charm sector

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    PoS(EPS-HEP 2009) 186 - On behalf of the LHCb collaborationInternational audienceLHCb is an heavy flavour precision experiment with LHC at CERN. It will search for New Physics in CP violation and rare decays in the heavy quarks sector. The experiment is ready to take data for the soon expected start-up of the LHC. An overview of its physics program in both the rare decays of B hadrons and CP violation in the charm sectors is given, illustrated by few key examples: measurements of the \bstomumu\ and \btokstmumu\ decay modes, study of the photon helicity using the \bstophig\ and \btokstee\ decay modes, as well as search for CP violation using D^0 meson

    Renormalization of heavy-light currents in moving NRQCD

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    Heavy-light decays such as B→πℓΜB \to \pi \ell \nu, B→K∗γB \to K^{*} \gamma and B→K(∗)ℓℓB \to K^{(*)} \ell \ell can be used to constrain the parameters of the Standard Model and in indirect searches for new physics. While the precision of experimental results has improved over the last years this has still to be matched by equally precise theoretical predictions. The calculation of heavy-light form factors is currently carried out in lattice QCD. Due to its small Compton wavelength we discretize the heavy quark in an effective non-relativistic theory. By formulating the theory in a moving frame of reference discretization errors in the final state are reduced at large recoil. Over the last years the formalism has been improved and tested extensively. Systematic uncertainties are reduced by renormalizing the m(oving)NRQCD action and heavy-light decay operators. The theory differs from QCD only for large loop momenta at the order of the lattice cutoff and the calculation can be carried out in perturbation theory as an expansion in the strong coupling constant. In this paper we calculate the one loop corrections to the heavy-light vector and tensor operator. Due to the complexity of the action the generation of lattice Feynman rules is automated and loop integrals are solved by the adaptive Monte Carlo integrator VEGAS. We discuss the infrared and ultraviolet divergences in the loop integrals both in the continuum and on the lattice. The light quarks are discretized in the ASQTad and highly improved staggered quark (HISQ) action; the formalism is easily extended to other quark actions.Comment: 24 pages, 11 figures. Published in Phys. Rev. D. Corrected a typo in eqn. (51

    Rare Decays and CP Violation in the BsB_s System

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    CP violating phenomena and rare decays of BsB_s mesons offer interesting probes to test the quark-flavor sector of the Standard Model. In view of plenty of data reported in particular from the Large Hadron Collider, this topic has received a lot of attention in 2012. We give an overview of the the most recent experimental results, new theoretical developments, and discuss the prospects for the future exploration of the BsB_s-meson system.Comment: 40 pages, 10 figures, Invited contribution to Annual Review of Nuclear and Particle Science, Vol. 63 (2013
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