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On the Delta I = 1/2 Rule in Holographic QCD

ArXiv hep-ph/0512089 (2005)

Authors:

Thomas Hambye, Babiker Hassanain, John March-Russell, Martin Schvellinger

Abstract:

We study the $\Delta I = 1/2$ rule for kaon decays and the $B_K$ parameter for $K^0 - {\bar K}^0$ mixing in a dual 5-dimensional holographic QCD model. We perform, in the chiral limit, computations of the relevant four-point current-current correlators, which depend upon self-interactions among the 5D bulk fields. Spontaneous chiral symmetry breaking ($\chi$SB) is realized through boundary conditions on the bulk fields. Numerical results are analyzed in comparison with QCD, chiral perturbation theory ($\chi$PT) and data, finding reasonable agreement with the experimental values of the $g_8$ and $g_{27}$ parameters describing the $\Delta I =1/2,3/2$ decay channels.
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On the Delta I = 1/2 Rule in Holographic QCD

(2005)

Authors:

Thomas Hambye, Babiker Hassanain, John March-Russell, Martin Schvellinger
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Measurement of the Top Quark Mass with the Dynamical Likelihood Method using Lepton plus Jets Events with b-tags in ppbar Collisions at s**(1/2) = 1.96 TeV

ArXiv hep-ex/0512009 (2005)
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The cornell/purdue TPC

LCWS 2005 - 2005 International Linear Collider Workshop (2005)

Authors:

DP Peterson, L Fields, RS Galik, P Onyisi, G Bolla, IPJ Shipsey

Abstract:

A prototype TPC has been completed and commissioned at Cornell for the purpose of evaluating performance and reliability of candidate gas-amplification devices and pad configurations. The TPC has an active area of 10cm square and a drift length of 64cm. The current readout electronics includes 32 channels of 14 bit, 105 MHz 14flash-ADCs. Baseline measurements have been taken with a wire gas-amplification module. The Purdue group has prepared a single GEM readout module. First results using the wire gas-amplification and single GEM are described.

Search for Bs0â†Î+Î- and Bd0â†Î +Î- Decays in pp Collisions with CDF II

Physical Review Letters 95:22 (2005)

Authors:

A Abulencia, D Acosta, J Adelman, T Affolder, T Akimoto, MG Albrow, D Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antos, M Aoki, G Apollinari, JF Arguin, T Arisawa, A Artikov, W Ashmanskas, A Attal, F Azfar, P Azzi-Bacchetta, P Azzurri, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, S Baroiant, V Bartsch, G Bauer, F Bedeschi, S Behari, S Belforte, G Bellettini, J Bellinger, A Belloni, E Ben-Haim, D Benjamin, A Beretvas, J Beringer, T Berry, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, V Boisvert, G Bolla, A Bolshov, D Bortoletto, J Boudreau, S Bourov, A Boveia, B Brau, C Bromberg, E Brubaker, J Budagov, HS Budd, S Budd, K Burkett, G Busetto, P Bussey, KL Byrum, S Cabrera, M Campanelli, M Campbell, F Canelli, A Canepa, D Carlsmith, R Carosi, S Carron, M Casarsa, A Castro, P Catastini, D Cauz, M Cavalli-Sforza, A Cerri, L Cerrito, SH Chang, J Chapman, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, I Cho, K Cho, D Chokheli, JP Chou, PH Chu, SH Chuang, K Chung

Abstract:

We report on a search for Bs0â†Î+Î- and Bd0â†Î+Î- decays in ppÂcollisions at s=1.96TeV using 364â€â€pb-1 of data collected by the CDF II detector at the Fermilab Tevatron Collider. After applying all selection requirements, we observe no candidates inside the Bs0 or Bd0 mass windows. The resulting upper limits on the branching fractions are B(Bs0↠Î+Î-)<1.5Ã-10-7 and B(Bd0â†Î+Î-) <3.9Ã-10-8 at 90% confidence level. © 2005 The American Physical Society.
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