8,751 research outputs found
Heavy Flavor Physics
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 Physics
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
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
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
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 decays with one missing particle
A new technique is discussed that can be applied to 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 and
, selected charmless decays, and detection of any exotic objects
coupling to 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)
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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