Lepton polarization asymmetry in {ital B}{r_arrow}{ital K}{sup ({asterisk})}{ital l}{sup +}{ital l}{sup {minus}}

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.54.5636· OSTI ID:388452

Geng, C Q; Kao, C P ^[1]

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1. Department of Physics, National Tsing Hua University, Hsinchu, Taiwan, Republic of (China)

We investigate the longitudinal lepton polarization asymmetry in the exclusive processes {ital B}{r_arrow}{ital Kl}{sup +}{ital l}{sup {minus}} and {ital B}{r_arrow}{ital K}{asterisk}{ital l}{sup +}{ital l}{sup {minus}}. We include both short- and long-distance contributions to the asymmetry in our discussions. We find that average values of the polarization asymmetries of the muon and {tau} for {ital B}{r_arrow}{ital K}{sup ({asterisk})}{mu}{sup +}{mu}{sup {minus}} and {ital B}{r_arrow}{ital K}{sup ({asterisk})}{tau}{sup +}{tau}{sup {minus}} are {minus}0.8 ({minus}0.7) and {minus}0.2 ({minus}0.5), respectively. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 388452
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 54; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ASYMMETRY
B MESONS
EXCLUSIVE INTERACTIONS
K*-892 MESONS
KAONS
LEPTONS
MUONS
POLARIZATION
SEMILEPTONIC DECAY
TAU PARTICLES