182038613
Search for D0 ---> K+ pi- pi0
34604877
Measurement of Cabibbo-suppressed decays of the tau lepton.
Branching ratios for the dominant Cabibbo-suppressed decays of the [tau] lepton have been measured by CLEO II in [ital e][sup +][ital e][sup [minus]] annihilation at the Cornell Electron Storage Ring ([radical][ital s] [similar to]10.6 GeV) using kaons with momenta below 0.7 GeV/[ital c]. The inclusive branching ratio into one charged kaon is (1.60[plus minus]0.12[plus minus]0.19)%. For the exclusive decays, [ital B]([tau][sup [minus]][r arrow][ital K][sup [minus]][nu][sub [tau]])=(0.66[plus minus]0.07[plus minus]0.09)%, [ital B]([tau][sup [minus]][r arrow][ital K][sup [minus]][pi][sup 0][nu][sub [tau]])=(0.51 [plus minus]0.10[plus minus]0.07)%, and, based on three events, [ital B]([tau][sup [minus]][r arrow][ital K][sup [minus]]2[pi][sup 0][nu][sub [tau]])[lt]0.3% at the 90% confidence level. These represent significant improvements over previous results. [ital B]([tau][sup [minus]][r arrow][ital K][sup [minus]][pi][sup 0][nu][sub [tau]]) is measured for the first time with exclusive [pi][sup 0] reconstruction.
12584275
Study of charmless hadronic B meson decays to pseudoscalar-vector final states.
We report results of searches for charmless hadronic B meson decays to pseudoscalar( pi(+/-), K+/-, pi(0), or K(0)(S))-vector( rho, K(*), or omega) final states. By using 9.7x10(6) BB pairs collected with the CLEO detector, we report the first observation of B(-)--->pi(-)rho(0), B(0)-->pi(+/-)rho(-/+), and B(-)-->pi(-)omega, which are expected to be dominated by hadronic b-->u transitions. The measured branching fractions are (10.4(+3.3)(-3.4)+/-2.1)x10(-6), (27.6(+8.4)(-7.4)+/-4.2)x10(-6), and (11.3(+3.3)(-2.9)+/-1. 4)x10(-6), respectively. Branching fraction upper limits are set for all of the other decay modes investigated.
181671081
Search for B ---> K lepton+ lepton- and B ---> K* lepton+ lepton- decays
117035924
Measurement of B (tau- ---> tau-neutrino K- K0) and b (tau- ---> tau-neutrino K- K0 pi0)
16089528
Observation of radiative leptonic decay of the tau lepton
Using 4.68 fb(-1) of e(+)e(-) annihilation data collected with the CLEO II detector at the Cornell Electron Storage Ring, we have studied tau radiative decays tau(-)-->nu(tau)&mgr;(-)nu;(&mgr;)gamma and tau(-)-->nu(tau)e(-)nu;(e)gamma. For a 10 MeV minimum photon energy in the tau rest frame, the branching fraction for radiative tau decay to a muon or electron is measured to be (3.61+/-0.16+/-0. 35)x10(-3) or (1.75+/-0.06+/-0.17)x10(-2), respectively. The branching fractions are in agreement with standard model theoretical predictions.
120027079
Results from the first two years of VERITAS observations
Abstract The VERITAS observatory is an imaging atmospheric Cherenkov telescope array located in southern Arizona and covers an energy range between 100 GeV and 30 TeV. The VERITAS collaboration pursues a rigorous observing program that targets a range of key science objectives in astrophysics and particle physics; the understanding of the origin of cosmic rays, the search for supersymmetric dark matter self-annihilation, illuminating the connection between black holes and relativistic jets and constraints to the cosmological diffuse infrared background. We provide a summary of results from the first two years of observations with the full 4-telecope array reported at RICAP09.
29052022
The search for millicharged particles at SLAC
Quantization of electric charge has been probed to a high degree of precision using a variety of experimental techniques. However, the theoretical underpinning of charge quantization has yet to be determined, leaving open the possibility that quantization is not a fundamental law of nature, and that free particles with fractional electric charge may one day be encountered. This dissertation describes a search for particles with very small (10{sup -3}e or below) electric charge, carried out at an electron accelerator (SLAC). The particles sought were assumed to be long lived or stable and to participate primarily in electromagnetic interactions. The search relied upon a large (1.3-meter) scintillation counter to detect low levels of ionization generated by relativistic fractionally charged particles produced in the collision of a 29.5-GeV electron beam with a six radiation length tungsten target. The data reveal no evidence of fractional charge, and allow for the exclusion of a portion of charge-mass parameter space spanning roughly 10{sup -7} to 10{sup 2} MeV/c{sup 2} and 10{sup -2} to 10{sup -5} e.
118186296
Lectures on the geometry of quantization
160875766
VERITAS: STATUS AND EARLY RESULTS ∗
Department of Physics and Astronomy, University of California at Los Angeles430 Portola Plaza, Box 951547, Los Angeles, CA 90095-1547 USAfor the VERITAS CollaborationV.A. Acciari, G. Blaylock, S.M. Bradbury, J.H. Buckley, V. BugaevY. Butt, K.L. Byrum, D.A. Carter-Lewis, O. Celik, A. CesariniL. Ciupik, Y.C.K. Chow, P. Cogan, P. Colin, W. Cui, M.K. DanielC. Dowdall, P. Dowkontt, C. Duke, T. Ergin, A.D. FalconeD.J. Fegan, S.J. Fegan, J.P. Finley, P. Fortin, L.F. Fortson, D. GallK. Gibbs, G. Gillanders, J. Grube, R. Guenette, G. Gyuk, D. HannaE. Hays, J. Holder, D. Horan, S.B. Hughes, C.M. Hui, T.B. HumenskyA. Imran, P. Kaaret, G.E. Kenny, M. Kertzman, D. Kieda, J. KildeaA. Konopelko, H. Krawczynski, F. Krennrich, M.J. Lang, S. LebohecK. Lee, G. Maier, H. Manseri, A. McCann, M. McCutcheon, J. MillisP. Moriarty, R. Mukherjee, T. Nagai, J. Niemiec, P.A. OgdenR.A. Ong, D. Pandel, J.S. Perkins, F. Pizlo, M. Pohl, J. QuinnK. Ragan, P.T. Reynolds, E. Roache, H.J. Rose, M. SchroedterG.H. Sembroski, A.W. Smith, D. Steele, S.P. Swordy, A. SysonJ.A. Toner, L. Valcarcel, V.V. Vassiliev, R. Wagner, S.P. WakelyJ.E. Ward, T.C. Weekes, A. Weinstein, R.J. White, D.A. WilliamsS.A. Wissel, M. Wood, B. Zitzerhttp://veritas.sao.arizona.edu
121794904
A universal phase space for particles in Yang-Mills fields
Given a principal G-bundle P over M and a Hamiltonian G-space Q, one may construct the reduced symplectic manifold (T*P x Q)0. When a connection on P is chosen, this manifold becomes a bundle over T*M with fibre Q. It is shown that this bundle is precisely the phase space constructed by Sternberg for a classical particle in a Yang-Mills field.