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Title: Measurement of Inclusive Radiative B-Meson Decays with a Photon Energy Threshold of 1.7 GeV

Abstract

Using 605 fb{sup -1} of data collected at the UPSILON(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B->X{sub s}gamma. For the lower photon energy thresholds of 1.7, 1.8, 1.9, and 2.0 GeV, as defined in the rest frame of the B meson, we measure the partial branching fraction and the mean and variance of the photon energy spectrum. At the 1.7 GeV threshold we obtain the partial branching fraction BF(B->X{sub s}gamma)=(3.45+-0.15+-0.40)x10{sup -4}, where the errors are statistical and systematic.

Authors:
; ; ; ; ; ;  [1];  [2]; ; ; ;  [3];  [4];  [5];  [4]; ; ;  [6]; ; more »; ;  [7] « less
  1. University of Melbourne, School of Physics, Victoria 3010 (Australia)
  2. Department of Physics, University of Tokyo, Tokyo (Japan)
  3. Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)
  4. (Russian Federation)
  5. Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland)
  6. University of Sydney, Sydney, New South Wales (Australia)
  7. Institute for Theoretical and Experimental Physics, Moscow (Russian Federation)
Publication Date:
OSTI Identifier:
21370890
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 103; Journal Issue: 24; Other Information: DOI: 10.1103/PhysRevLett.103.241801; (c) 2009 The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B MESONS; BRANCHING RATIO; ENERGY SPECTRA; GEV RANGE 01-10; PHOTONS; RADIATIVE DECAY; BEAUTY MESONS; BEAUTY PARTICLES; BOSONS; DECAY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; ENERGY RANGE; GEV RANGE; HADRONS; MASSLESS PARTICLES; MESONS; PARTICLE DECAY; PSEUDOSCALAR MESONS; SPECTRA

Citation Formats

Limosani, A., Barberio, E., Julius, T., Sevior, M. E., Taylor, G. N., Urquijo, P., Wedd, R., Aihara, H., Arinstein, K., Bondar, A., Eidelman, S., Shebalin, V., Novosibirsk State University, Novosibirsk, Aushev, T., Institute for Theoretical and Experimental Physics, Moscow, Bakich, A. M., Varvell, K. E., Yabsley, B. D., Balagura, V., Danilov, M., Liventsev, D., and Mizuk, R. Measurement of Inclusive Radiative B-Meson Decays with a Photon Energy Threshold of 1.7 GeV. United States: N. p., 2009. Web. doi:10.1103/PHYSREVLETT.103.241801.
Limosani, A., Barberio, E., Julius, T., Sevior, M. E., Taylor, G. N., Urquijo, P., Wedd, R., Aihara, H., Arinstein, K., Bondar, A., Eidelman, S., Shebalin, V., Novosibirsk State University, Novosibirsk, Aushev, T., Institute for Theoretical and Experimental Physics, Moscow, Bakich, A. M., Varvell, K. E., Yabsley, B. D., Balagura, V., Danilov, M., Liventsev, D., & Mizuk, R. Measurement of Inclusive Radiative B-Meson Decays with a Photon Energy Threshold of 1.7 GeV. United States. doi:10.1103/PHYSREVLETT.103.241801.
Limosani, A., Barberio, E., Julius, T., Sevior, M. E., Taylor, G. N., Urquijo, P., Wedd, R., Aihara, H., Arinstein, K., Bondar, A., Eidelman, S., Shebalin, V., Novosibirsk State University, Novosibirsk, Aushev, T., Institute for Theoretical and Experimental Physics, Moscow, Bakich, A. M., Varvell, K. E., Yabsley, B. D., Balagura, V., Danilov, M., Liventsev, D., and Mizuk, R. Fri . "Measurement of Inclusive Radiative B-Meson Decays with a Photon Energy Threshold of 1.7 GeV". United States. doi:10.1103/PHYSREVLETT.103.241801.
@article{osti_21370890,
title = {Measurement of Inclusive Radiative B-Meson Decays with a Photon Energy Threshold of 1.7 GeV},
author = {Limosani, A. and Barberio, E. and Julius, T. and Sevior, M. E. and Taylor, G. N. and Urquijo, P. and Wedd, R. and Aihara, H. and Arinstein, K. and Bondar, A. and Eidelman, S. and Shebalin, V. and Novosibirsk State University, Novosibirsk and Aushev, T. and Institute for Theoretical and Experimental Physics, Moscow and Bakich, A. M. and Varvell, K. E. and Yabsley, B. D. and Balagura, V. and Danilov, M. and Liventsev, D. and Mizuk, R.},
abstractNote = {Using 605 fb{sup -1} of data collected at the UPSILON(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B->X{sub s}gamma. For the lower photon energy thresholds of 1.7, 1.8, 1.9, and 2.0 GeV, as defined in the rest frame of the B meson, we measure the partial branching fraction and the mean and variance of the photon energy spectrum. At the 1.7 GeV threshold we obtain the partial branching fraction BF(B->X{sub s}gamma)=(3.45+-0.15+-0.40)x10{sup -4}, where the errors are statistical and systematic.},
doi = {10.1103/PHYSREVLETT.103.241801},
journal = {Physical Review Letters},
number = 24,
volume = 103,
place = {United States},
year = {Fri Dec 11 00:00:00 EST 2009},
month = {Fri Dec 11 00:00:00 EST 2009}
}