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Title: Measurement of the Ratio of Decay Amplitudes for B0bar -> J/psi K*0 and B0 -> J/psi K*0

Abstract

We have measured the time-dependent decay rate for the process B {yields} J/{psi} K*{sup 0}(892) in a sample of about 88 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. In this sample we study flavor-tagged events in which one neutral B meson is reconstructed in the J/{psi}K*{sup 0} or J/{psi} {bar K}*{sup 0} final state. We measure the coefficients of the cosine and sine terms in the time-dependent asymmetries for J/{psi}K*{sup 0} and J/{psi}{bar K}*{sup 0}, find them to be consistent with the Standard Model expectations, and set upper limits at 90% C.L. on the decay amplitude ratios |A({bar B}{sup 0} {yields} J/{psi}K*{sup 0})|/|A(B{sup 0} {yields} J/{psi}K*{sup 0})| < 0.26 and |A(B{sup 0} {yields} J/{psi}{bar K}*{sup 0})|/|A({bar B}{sup 0} {yields} J/{psi}{bar K}*{sup 0})| < 0.32. For a single ratio of wrong-flavor to favored amplitudes for B{sup 0} and {bar B}{sup 0} combined, we obtain an upper limit of 0.25 at 90% C.L.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Science (US)
OSTI Identifier:
826853
Report Number(s):
SLAC-PUB-10394
TRN: US0404243
DOE Contract Number:
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 5 Apr 2004
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; B MESONS; DECAY; DECAY AMPLITUDES; STANDARD MODEL

Citation Formats

Aubert, B. Measurement of the Ratio of Decay Amplitudes for B0bar -> J/psi K*0 and B0 -> J/psi K*0. United States: N. p., 2004. Web. doi:10.2172/826853.
Aubert, B. Measurement of the Ratio of Decay Amplitudes for B0bar -> J/psi K*0 and B0 -> J/psi K*0. United States. doi:10.2172/826853.
Aubert, B. Mon . "Measurement of the Ratio of Decay Amplitudes for B0bar -> J/psi K*0 and B0 -> J/psi K*0". United States. doi:10.2172/826853. https://www.osti.gov/servlets/purl/826853.
@article{osti_826853,
title = {Measurement of the Ratio of Decay Amplitudes for B0bar -> J/psi K*0 and B0 -> J/psi K*0},
author = {Aubert, B},
abstractNote = {We have measured the time-dependent decay rate for the process B {yields} J/{psi} K*{sup 0}(892) in a sample of about 88 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. In this sample we study flavor-tagged events in which one neutral B meson is reconstructed in the J/{psi}K*{sup 0} or J/{psi} {bar K}*{sup 0} final state. We measure the coefficients of the cosine and sine terms in the time-dependent asymmetries for J/{psi}K*{sup 0} and J/{psi}{bar K}*{sup 0}, find them to be consistent with the Standard Model expectations, and set upper limits at 90% C.L. on the decay amplitude ratios |A({bar B}{sup 0} {yields} J/{psi}K*{sup 0})|/|A(B{sup 0} {yields} J/{psi}K*{sup 0})| < 0.26 and |A(B{sup 0} {yields} J/{psi}{bar K}*{sup 0})|/|A({bar B}{sup 0} {yields} J/{psi}{bar K}*{sup 0})| < 0.32. For a single ratio of wrong-flavor to favored amplitudes for B{sup 0} and {bar B}{sup 0} combined, we obtain an upper limit of 0.25 at 90% C.L.},
doi = {10.2172/826853},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 05 00:00:00 EDT 2004},
month = {Mon Apr 05 00:00:00 EDT 2004}
}

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