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4 results on '"R. MESSNER"'

1. Additional evidence for B0_B0 mixing

Author

J. R. Johnson, L. J. Rosenberg, M. W. Gettner, L. Lavine, M. Piccolo, J. P. Venuti, R. Messner, H. R. Band, L. J. Moss, G. P. Goderre, I. M. Peruzzi, R. de Sangro, F. Muller, R. Prepost, N. Qi, R. E. Leedy, J. Pyrlik, D. M. Ritson, G. B. Chadwick, M. C. Delfino, D. E. Wiser, Piero Giorgio Verdini, Tiziano Camporesi, H. N. Nelson, E. von Goeler, Roy Weinstein, D. E. Groom, J. C. Sleeman, W. T. Ford, R. W. Zdarko, R. B. Hurst, J. R. Smith, T. Maruyama, and Alexander Lincoln Read

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Annihilation, Value (computer science), Mixing (physics)
Abstract

The rate of like-charge dimuons has been measured with the MAC detector in hardonic events produced in e + e − annihilation at √ s =29 GeV. If the observed excess is attributed to B 0 B 0 mixing, the corresponding value of the mixing parameter χ = Γ (B→ μ − X)/ Γ (B→ μ ± X) is χ =0.21 +0.29 −0.15 and χ >0.02 at 90% CL.

Published
1988
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2. A measurement of the forward-backward charge asymmetry at √s=29 GeV

Author

M. W. Gettner, I. M. Peruzzi, R. B. Hurst, J. R. Smith, L. J. Moss, R. de Sangro, F. Muller, R. Prepost, D. M. Ritson, M. C. Delfino, T. Maruyama, R. Messner, M. Piccolo, H. R. Band, R. E. Leedy, Alexander Lincoln Read, G. B. Chadwick, J. P. Venuti, Tiziano Camporesi, L. J. Rosenberg, R. W. Zdarko, J. R. Johnson, D. E. Wiser, H. N. Nelson, G. P. Goderre, N. Qi, T. L. Lavine, J. Pyrlik, Roy Weinstein, D. E. Groom, J. C. Sleeman, W. T. Ford, Piero Giorgio Verdini, and E. von Goeler

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Muon, media_common.quotation_subject, Charge (physics), Forward backward, Asymmetry, Mixing (physics), media_common
Abstract

High p ⊥ inclusive muon events produced in e + e − annihilations at √ s =29 GeV have been analyzed to obtain a measurement of the b b forward-backward charge asymmetry. The result A b =0.034±0.070±0.035 differs from the theoretical expectation (−0.16) unless substantial B 0  B 0 mixing is assumed.

Published
1989
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3. Measurements of tau decays to three pions

Author

J. P. Venuti, R. Prepost, Tiziano Camporesi, M. C. Delfino, R. B. Hurst, J.R. Johnson, H. R. Band, F. Muller, D. M. Ritson, R. W. Zdarko, Roy Weinstein, Alexander Lincoln Read, L. J. Moss, J. Pyrlik, Piero Giorgio Verdini, M. W. Gettner, R. Messner, T. Maruyama, E. von Goeler, T. L. Lavine, R. E. Leedy, I. M. Peruzzi, N. Qi, G. B. Chadwick, J. R. Smith, H. N. Nelson, L. J. Rosenberg, G. P. Goderre, R. de Sangro, M. Piccolo, D. E. Groom, J. C. Sleeman, W. T. Ford, and D. E. Wiser

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Pion, Meson, Electron–positron annihilation, Nuclear Theory, Detector, High Energy Physics::Experiment, Nuclear Experiment, Storage ring
Abstract

We reports the result of a study of a tau decays with three pions in the final state (τ±→π±π+π−υτ and τ ±→π±π0π0υτ) from data accumulated with the MAC detector operating at the PEP storage ring. The branching fractions for these modes are measured to be 0.070±0.003±0.007 and, with assumptions discussed in the text, 0.087±0.004±0.011, respectively. Assuming that these final states result from the decay of the a1 meson, we measure the resonant parameters of the a1 with the three charged pion sample to be ma1=1166±18±11 MeV and γa1=405±75±25 MeV, and with the one charged plus two neutral pions sample to be ma1=1164±41±23 MeV and γa1=419±108±57 MeV.

Published
1987
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4. First measurement of the double-inclusive B/B hadron energy distribution in e+e− annihilations, and of angle-dependent moments of the B and B energies

Author

J. L. Wittlin, I. Adam, K. T. Flood, S. Walston, K. G. Baird, J. Va'vra, H. Akimoto, L.S. Rochester, H. Yuta, J. M. Bauer, O. H. Saxton, A. W. Weidemann, T. L. Usher, J.J. Reidy, J. Schwiening, F. E. Taylor, C. H. Park, Bruce Schumm, H. R. Band, J. P. Fernandez, R. R. Kofler, M.E. Huffer, J. R. Bogart, V. Lia, D. L. Burke, M. R. Convery, I. Erofeeva, S. Manly, R. Berger, W. M. Bugg, N. B. Sinev, A. P. Waite, M. Morii, J. A. Jaros, G. Bellodi, G. Nesom, A. Suzuki, G. R. Bower, S. Willocq, R. Dubois, N. De Groot, G. Blaylock, H. M. Steiner, Gilbert Shapiro, H. Staengle, S. S. Hertzbach, T. Schalk, R. Messner, T. Maruyama, R. Verdier, P. N. Burrows, C. Y. Prescott, E. L. Hart, C.S. Lin, M. Kalelkar, K. Hasuko, E. R. Weiss, V. Eschenburg, D. Su, G. Mancinelli, P. C. Rowson, G. Crawford, I. M. Peruzzi, H. J. Kang, D. Aston, V.V. Serbo, D. J. Jackson, R. E. Cassell, E. Etzion, W. J. Wisniewski, M. Piccolo, S. Narita, F. Suekane, X. Huynh, T. H. Burnett, S. J. Yellin, J. J. Russell, Achim Stahl, D.L. Wagner, Dominik Müller, R. Cowan, R. Frey, L.S. Osborne, Kenji Abe, U. Nauenberg, Giancarlo Mantovani, S. Fahey, J. S. Whitaker, N. Oishi, T. Abe, M. Doser, E. Torrence, J. R. Johnson, R. Kajikawa, M. Iwasaki, C. Baltay, D. N. Dong, C.J.S. Damerell, R. J. Wilson, P.L. Reinertsen, J. A. Snyder, D. Onoprienko, R. Prepost, Martin Breidenbach, P.F. Jacques, Zihao Jiang, M. Daoudi, A. Sugiyama, V. Murzin, A. Chou, M. Woods, A. K. McKemey, K.C. Moffeit, D. W. G. S. Leith, L. Piemontese, H. O. Cohn, R.J. Plano, T. B. Moore, Thomas W. Markiewicz, B. N. Ratcliff, P. E. Stamer, C. C. Young, Koya Abe, J. Yashima, R. Kroeger, J. E. Brau, M. Langston, S. H. Williams, Timothy Barklow, A. Calcaterra, A. S. Johnson, T. R. Wright, H. A. Neal, R. K. Yamamoto, R. S. Panvini, D. Falciai, J. Thom, J. A. Coller, Melody A. Swartz, V. Cook, and R. de Sangro

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, FOS: Physical sciences, Order (ring theory), Perturbative QCD, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Production (computer science), High Energy Physics::Experiment, Ansatz, Bar (unit)
Abstract

We have made the first measurement of the double-inclusive B/Bbar energy distribution in e+e- annihilations, using a sample of 400,000 hadronic Z0 decay events recorded in the SLD experiment at SLAC between 1996 and 1998. The small and stable SLC beam spot and the CCD-based vertex detector were used to reconstruct B/Bbar decay vertices with high efficiency and purity, and to provide measurements of the kinematic quantities used to calculate the B energies in this novel technique. We measured the B/Bbar energies with good efficiency and resolution over the full kinematic range. We measured moments of the scaled energies of the B and Bbar hadrons vs. the opening angle between them. By comparing these results with perturbative QCD predictions we tested the ansatz of factorisation in heavy-quark production. A recent next-to-leading order calculation reproduces the data., Comment: 17 pages, 6 figures; submitted to Physics Letters B

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