Measurement of sin 2{beta} from B{yields}J/{psi}K{sub S}{sup 0} with the CDF detector

Journal Article · Fri Mar 31 23:00:00 EST 2000 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.61.072005· OSTI ID:20215950

Affolder, T ^[1]; Akimoto, H ^[2]; Akopian, A ^[3]; Albrow, M G ^[4]; Amaral, P ^[5]; Amendolia, S R ^[6]; Amidei, D ^[7]; Antos, J ^[8]; Apollinari, G ^[3]; Arisawa, T ^[2]

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1. Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
2. Waseda University, Tokyo 169, (Japan)
3. Rockefeller University, New York, New York 10021 (United States)
4. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
5. Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)
6. Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa, (Italy)
7. University of Michigan, Ann Arbor, Michigan 48109 (United States)
8. Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China (China)

This paper reports an updated measurement of the standard model CP violation parameter sin 2{beta} using the CDF Detector at Fermilab. The entire run I data sample of 110 pb{sup -1} of proton-antiproton collisions at {radical}(s)=1.8 TeV is used to identify a signal sample of {approx}400 B{yields}J/{psi} K{sub S}{sup 0} events, where J/{psi}{yields}{mu}{sup +}{mu}{sup -} and K{sub S}{sup 0}{yields}{pi}{sup +}{pi}{sup -}. The flavor of the neutral B meson is identified at the time of production by combining information from three tagging algorithms: a same-side tag, a jet-charge tag, and a soft-lepton tag. A maximum likelihood fitting method is used to determine sin 2{beta}=0.79{sub -0.44}{sup +0.41}(stat+syst). This value of sin 2{beta} is consistent with the standard model prediction, based upon existing measurements, of a large positive CP-violating asymmetry in this decay mode. (c) 2000 The American Physical Society.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• OSTI ID: 20215950
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 61; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
CP INVARIANCE
EXPERIMENTAL DATA
FERMILAB COLLIDER DETECTOR
J PSI-3097 MESONS
KAONS NEUTRAL
MUONS MINUS
MUONS PLUS
PROTON-ANTIPROTON INTERACTIONS
STANDARD MODEL