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Title: Branching Fraction Measurements of B{sup +}{yields}{rho}{sup +}{gamma}, B{sup 0}{yields}{rho}{sup 0}{gamma}, and B{sup 0}{yields}{omega}{gamma}

Abstract

We present a study of the decays B{sup +}{yields}{rho}{sup +}{gamma}, B{sup 0}{yields}{rho}{sup 0}{gamma}, and B{sup 0}{yields}{omega}{gamma}. The analysis is based on data containing 347x10{sup 6} BB events recorded with the BABAR detector at the PEP-II asymmetric B factory. We measure the branching fractions B(B{sup +}{yields}{rho}{sup +}{gamma})=(1.10{sub -0.33}{sup +0.37}{+-}0.09)x10{sup -6} and B(B{sup 0}{yields}{rho}{sup 0}{gamma})=(0.79{sub -0.20}{sup +0.22}{+-}0.06)x10{sup -6}, and set a 90% C.L. upper limit B(B{sup 0}{yields}{omega}{gamma})<0.78x10{sup -6}. We also measure the isospin-averaged branching fraction B(B{yields}({rho}/{omega}){gamma})=(1.25{sub -0.24}{sup +0.25}{+-}0.09)x10{sup -6}, from which we determine vertical bar V{sub td}/V{sub ts} vertical bar=0.200{sub -0.020}{sup +0.021}{+-}0.015, where the first uncertainty is experimental and the second is theoretical.

Authors:
; ; ; ; ; ; ; ;  [1];  [2];  [3]; ; ; ; ;  [4]; ; ;  [5];  [6]
  1. Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
  2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
  3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
  4. Institute of High Energy Physics, Beijing 100039 (China)
  5. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
  6. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States) (and others)
Publication Date:
OSTI Identifier:
20951228
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 15; Other Information: DOI: 10.1103/PhysRevLett.98.151802; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; B PLUS MESONS; BRANCHING RATIO; GAMMA RADIATION; ISOSPIN; OMEGA BARYONS; PARTICLE DECAY; RHO-770 MESONS

Citation Formats

Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J. P., Poireau, V., Prudent, X., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Chen, J. C., Qi, N. D., Rong, G., Wang, P., Zhu, Y. S., Eigen, G., Ofte, I., Stugu, B., and Abrams, G. S. Branching Fraction Measurements of B{sup +}{yields}{rho}{sup +}{gamma}, B{sup 0}{yields}{rho}{sup 0}{gamma}, and B{sup 0}{yields}{omega}{gamma}. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.151802.
Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J. P., Poireau, V., Prudent, X., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Chen, J. C., Qi, N. D., Rong, G., Wang, P., Zhu, Y. S., Eigen, G., Ofte, I., Stugu, B., & Abrams, G. S. Branching Fraction Measurements of B{sup +}{yields}{rho}{sup +}{gamma}, B{sup 0}{yields}{rho}{sup 0}{gamma}, and B{sup 0}{yields}{omega}{gamma}. United States. doi:10.1103/PHYSREVLETT.98.151802.
Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J. P., Poireau, V., Prudent, X., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Chen, J. C., Qi, N. D., Rong, G., Wang, P., Zhu, Y. S., Eigen, G., Ofte, I., Stugu, B., and Abrams, G. S. Fri . "Branching Fraction Measurements of B{sup +}{yields}{rho}{sup +}{gamma}, B{sup 0}{yields}{rho}{sup 0}{gamma}, and B{sup 0}{yields}{omega}{gamma}". United States. doi:10.1103/PHYSREVLETT.98.151802.
@article{osti_20951228,
title = {Branching Fraction Measurements of B{sup +}{yields}{rho}{sup +}{gamma}, B{sup 0}{yields}{rho}{sup 0}{gamma}, and B{sup 0}{yields}{omega}{gamma}},
author = {Aubert, B. and Bona, M. and Boutigny, D. and Karyotakis, Y. and Lees, J. P. and Poireau, V. and Prudent, X. and Tisserand, V. and Zghiche, A. and Grauges, E. and Palano, A. and Chen, J. C. and Qi, N. D. and Rong, G. and Wang, P. and Zhu, Y. S. and Eigen, G. and Ofte, I. and Stugu, B. and Abrams, G. S.},
abstractNote = {We present a study of the decays B{sup +}{yields}{rho}{sup +}{gamma}, B{sup 0}{yields}{rho}{sup 0}{gamma}, and B{sup 0}{yields}{omega}{gamma}. The analysis is based on data containing 347x10{sup 6} BB events recorded with the BABAR detector at the PEP-II asymmetric B factory. We measure the branching fractions B(B{sup +}{yields}{rho}{sup +}{gamma})=(1.10{sub -0.33}{sup +0.37}{+-}0.09)x10{sup -6} and B(B{sup 0}{yields}{rho}{sup 0}{gamma})=(0.79{sub -0.20}{sup +0.22}{+-}0.06)x10{sup -6}, and set a 90% C.L. upper limit B(B{sup 0}{yields}{omega}{gamma})<0.78x10{sup -6}. We also measure the isospin-averaged branching fraction B(B{yields}({rho}/{omega}){gamma})=(1.25{sub -0.24}{sup +0.25}{+-}0.09)x10{sup -6}, from which we determine vertical bar V{sub td}/V{sub ts} vertical bar=0.200{sub -0.020}{sup +0.021}{+-}0.015, where the first uncertainty is experimental and the second is theoretical.},
doi = {10.1103/PHYSREVLETT.98.151802},
journal = {Physical Review Letters},
number = 15,
volume = 98,
place = {United States},
year = {Fri Apr 13 00:00:00 EDT 2007},
month = {Fri Apr 13 00:00:00 EDT 2007}
}
  • We present branching fraction measurements for the radiative decays B{sup +}{yields}{rho}{sup +}{gamma}, B{sup 0}{yields}{rho}{sup 0}{gamma}, and B{sup 0}{yields}{omega}{gamma}. The analysis is based on a data sample of 465x10{sup 6} BB events collected with the BABAR detector at the PEP-II asymmetric-energy B Factory located at the Stanford Linear Accelerator Center. We find B(B{sup +}{yields}{rho}{sup +}{gamma})=(1.20{sub -0.37}{sup +0.42}{+-}0.20)x10{sup -6}, B(B{sup 0}{yields}{rho}{sup 0}{gamma})=(0.97{sub -0.22}{sup +0.24}{+-}0.06)x10{sup -6}, and a 90% C.L. upper limit B(B{sup 0}{yields}{omega}{gamma})<0.9x10{sup -6}, where the first error is statistical and the second is systematic. We also measure the isospin-violating quantity {gamma}(B{sup +}{yields}{rho}{sup +}{gamma})/2{gamma}(B{sup 0}{yields}{rho}{sup 0}{gamma})-1=-0.43{sub -0.22}{sup +0.25}{+-}0.10.
  • We measure the branching fraction (B), polarization (f{sub L}), and CP asymmetry (A{sub CP}) of B{sup {+-}}{yields}{rho}{sup {+-}}{rho}{sup 0} decays and search for the decay B{sup {+-}}{yields}{rho}{sup {+-}}f{sub 0}(980) based on a data sample of 231.8x10{sup 6} {upsilon}(4S){yields}BB decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. In B{sup {+-}}{yields}{rho}{sup {+-}}{rho}{sup 0} decays we measure B=(16.8{+-}2.2{+-}2.3)x10{sup -6}, f{sub L}=0.905{+-}0.042{sub -0.027}{sup +0.023}, and A{sub CP}=-0.12{+-}0.13{+-}0.10, and find an upper limit on the branching fraction of B{sup {+-}}{yields}{rho}{sup {+-}}f{sub 0}(980)({yields}{pi}{sup +}{pi}{sup -}) decays of 1.9x10{sup -6} at 90% confidence level.
  • We present the results of a study of the charmless vector-vector decay B{sup +}{yields}{rho}{sup +}K{sup *0}, based on 253 fb{sup -1} of data collected with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. We obtain the branching fraction B(B{sup +}{yields}{rho}{sup +}K*{sup 0})=[8.9{+-}1.7(stat){+-}1.2(syst)]x10{sup -6}. We also perform a helicity analysis of the {rho} and K* vector mesons, and obtain the longitudinal polarization fraction f{sub L}(B{sup +}{yields}{rho}{sup +}K*{sup 0})=0.43{+-}0.11(stat){sub -0.02}{sup +0.05}(syst)
  • We study B{sup 0}{yields}{rho}{sup 0}{rho}{sup 0} decays in a sample of 465x10{sup 6} {upsilon}(4S){yields}BB events collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider located at the Stanford Linear Accelerator Center (SLAC). We measure the branching fraction B=(0.92{+-}0.32{+-}0.14)x10{sup -6} and longitudinal polarization fraction f{sub L}=0.75{sub -0.14}{sup +0.11}{+-}0.05, where the first uncertainty is statistical and the second is systematic. The evidence for the B{sup 0}{yields}{rho}{sup 0}{rho}{sup 0} signal has a significance of 3.1 standard deviations, including systematic uncertainties. We investigate the proper-time dependence of the longitudinal component in the decay and measure the CP-violating coefficients S{sub L}{supmore » 00}=(0.3{+-}0.7{+-}0.2) and C{sub L}{sup 00}=(0.2{+-}0.8{+-}0.3). We study the implication of these results for the unitarity triangle angle {alpha}.« less
  • The authors present a study of the decays B{sup +} {yields} {rho}{sup +}{gamma}, B{sup 0} {yields} {rho}{sup 0}{gamma}, and B{sup 0} {yields} {omega}{gamma}. The analysis is based on data containing 347 million B{bar B} events recorded with the BABAR detector at the PEP-II asymmetric B factory. They measure the branching fractions {Beta}(B{sup +} {yields} {rho}{sup +}{gamma}) = (1.10{sub -0.33}{sup +0.37} {+-} 0.09) x 10{sup -6} and {Beta}(B{sup 0} {yields} {rho}{sup 0}{gamma}) = (0.79{sub -0.20}{sup +0.22} {+-} 0.06) x 10{sup -6}, and set a 90% C.L. upper limit {Beta}(B{sup 0} {yields} {omega}{gamma}) < 0.78 x 10{sup -6}. They also measure themore » isospin-averaged branching fraction {Beta}[B {yields} ({rho}/{omega}){gamma}] = (1.25{sub -0.24}{sup +0.25} {+-} 0.09) x 10{sup -6}, from which they determine |V{sub td}/V{sub ts}| = 0.200{sub -0.020}{sup +0.021} {+-} 0.015, where the first uncertainty is experimental and the second is theoretical.« less