8,751 research outputs found

    Heavy Flavor Physics

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    The main purpose of Heavy Flavor experiments is to discover physics beyond the Standard Model, or characterize it, should it be found elsewhere. Thus, current limits on New Physics (NP) are reviewed. New results are presented, some involving processes that could show NP even with current data. Specific topics include the CKM element |Vub|, the forward-backward asymmetry in B -> K* mu+ mu-, b-hadron fractions at the LHC, B(Bs -> mu+ mu-), first observations of several Bs and Bc decay modes, the X(4140), new b-baryons and their decays, searches for Majorana neutrinos, and Lepton Flavor Violation.Comment: To appear in Proceedings of the DPF-2011 Conference, Providence, RI, August 8-13, 2011, 16 pages, 26 figures; version 2 fixed some typographical error

    Experimental Status of BB Physics

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    A short summary is given of the current status of B physics. Reasons for physics beyond the Standard Model are discussed. Constraints on New Physics are given using measurements of B mixing, Bs mixing, and CP violation, along with |Vub. Future goals, and upcoming new experiments are also mentioned.Comment: Invited talk at X Mexican Workshop on Particles and Fields, Morelia, Michoacan, Mexico, Nov. 7-12, 2005; 16 pages and 12 figures; (added references

    Pathological Science

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    I discuss examples of what Dr. Irving Langmuir, a Nobel prize winner in Chemistry, called "the science of things that aren't so." Some of his examples are reviewed and others from High Energy Physics are added. It is hoped that discussing these incidents will help us develop an understanding of some potential pitfalls.Comment: Presented at Theoretical Advanced Study Institute In Elementary Particle Physics (Tasi), University of Colorado, Boulder, Colorado June, 2000. To appear in the proceedings. (10/31/2000 - Fixed a reference.

    Future of Heavy Flavour Physics: Experimental Perspective

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    I discuss what measurements need to be done to search for physics beyond the Standard CKM model, rather than just what studies can be done in the near future. It is also important to accurately measure the CKM matrix elements. Current best estimates for two important elements are: |V_{cb}|=0.0381 +/- 0.0021 and |V_{ub}/V_{cb}|=0.085 +/- 0.019. Finally, future experiments are discussed.Comment: Presented at "Heavy Flavours 8," Southampton, UK, July 1999, 9 pages 7 figure

    Future B Experiments from The BTeV/LHC-b Perspective

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    Many measurements are necessary in the program of studying mixing, CP violation and rare decays of b and c quarks. These measurements require large numbers of B^o, B_s, B^- and D^{*+} hadrons. Fortunately, copius production of particles containing b and c quarks will occur at Tevatron and the LHC. The crucial measurements are described here, as well as the design of the two experiments, LHC-b and BTeV, that can exploit the 4-20 x 10^{11} b hadrons produced every 10^7 seconds.Comment: Presented at the 3rd International Conference on B Physics and CP Violation, Taipei, December 3-7, 1999 15 pages, 10 figure

    Method of Studying Λb0\Lambda_b^0 decays with one missing particle

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    A new technique is discussed that can be applied to Λb0\Lambda_b^0 baryon decays where decays with one missing particle can be discerned from background and their branching fractions determined, along with other properties of the decays. Applications include measurements of the CKM elements Vub|V_{ub}| and Vcb|V_{cb}|, selected charmless decays, and detection of any exotic objects coupling to bsb\to s decays, such as the inflaton.Comment: 6 pages, 2 figures, updated for referees comments on July 16, 201

    Observation of the Dsj(2463) and Confirmation of the Dsj*(2317)

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    Using 13.5 inverse-femtobarns of e+e- annihilation data in the CLEO II detector at CESR, we have observed a new narrow state decaying to Ds*+ pio, denoted the DsJ(2463). A possible interpretation holds that this is a J^P = 1+^ partner to the DsJ*(2317) state recently discovered by the BaBar Collaboration which is consistent with J^P = 0^+. We have also confirmed the existence of the DsJ*(2317) in its decay to Ds+ pio. We have measured the masses of both states, accounting for the cross-feed background that the two states represent for each other, and have searched for other decay channels for both states. No narrow resonances are seen in neutral or doubly charged Ds pi modes.Comment: Presented at MRST 2003 conference, "Joefest" Syracuse University, May 13-15, 2003; Conf. on the Intersections of Particle & Nuclear Phyiscs, New York, NY, May 19-24, 2003; Flavor Physics and CP Violation, Ecole Polytechnique, Paris, France, June 3-6, 2003; 7 pages 4 figure
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