Measurement of the CP-violation parameter sin(2{beta}) in B{sup 0}{sub d}/{ovr B}{sup 0}{sub d} {yields} J/{psi}K{sup 0}{sub s} decays.

Journal Article · Tue Dec 01 00:00:00 EST 1998 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.81.5513· OSTI ID:942514

Abe, F; Akimoto, H; Akopian, A; Albrow, M G; Amadon, A; Blair, R E; Byrum, K L; Kovacs, E; Kuhlmann, S E; LeCompte, T; Nodulman, L; Proudfoot, J; Thurman-Keup, R; Wagner, R G; Wicklund, A B; FNAL,

We present a measurement of the time-dependent asymmetry in the rate for {ovr B}{sub d}{sup 0} versus B{sub d}{sup 0} decays to J/{psi}K{sub s}{sup 0}. A nonzero asymmetry would be an indication of CP violation, and within the standard model this may be used to measure the CP-violation parameter sin(2{beta}). A total of 198{+-}17 B{sub d}{sup 0}/{ovr B}{sub d}{sup 0} decays were observed in p{ovr p} collisions at sqrt[s] = 1.8 TeV by the CDF detector at the Fermilab Tevatron. B{sub d}{sup 0} and {ovr B}{sub d}{sup 0} are distinguished by a technique based on charge correlations from hadronization of the b quark. Our analysis results in sin(2{beta}) = 1.8{+-}1.1(stat){+-}0.3(syst).

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); National Science Foundation (NSF); FOR; OUS
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 942514
• Report Number(s): ANL-HEP-PR-99-20; PRLTAO; TRN: US200916%%562
• Journal Information: Phys. Rev. Lett., Vol. 81, Issue 25 ; Dec. 1998; ISSN 0031-9007
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

43 PARTICLE ACCELERATORS
ASYMMETRY
B QUARKS
CHARGES
COLLISIONS
CORRELATIONS
DECAY
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
STANDARD MODEL