Semileptonic decays of B{sub c} mesons into charmonium states in a relativistic quark model

Journal Article · Sun May 01 04:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.094006· OSTI ID:20709365

Ivanov, Mikhail A ^[1]; Koerner, Juergen G ^[2]; Santorelli, Pietro ^[3]

---

1. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation)
2. Institut fuer Physik, Johannes Gutenberg-Universitaet, D-55099 Mainz (Germany)
3. Dipartimento di Scienze Fisiche, Universita di Napoli 'Federico II' (Italy) and Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (Italy)

We use the framework of a relativistic constituent quark model to study the semileptonic transitions of the B{sub c} meson into (cc) charmonium states where (cc)={eta}{sub c}({sup 1}S{sub 0}), J/{psi}({sup 3}S{sub 1}), {chi}{sub c0}({sup 3}P{sub 0}), {chi}{sub c1}({sup 3}P{sub 1}), h{sub c}({sup 1}P{sub 1}), {chi}{sub c2}({sup 3}P{sub 2}), {psi}({sup 3}D{sub 2}). We compute the q{sup 2} dependence of all relevant form factors and give predictions for their semileptonic B{sub c} decay modes including also their {tau} modes. We derive a formula for the polar angle distribution of the charged lepton in the (l{nu}{sub l})-c.m. frame and compute the partial helicity rates that multiply the angular factors in the decay distribution. For the discovery channel B{sub c}{yields}J/{psi}({yields}{mu}{sup +}{mu}{sup -})l{nu} we compute the transverse/longitudinal composition of the J/{psi} which can be determined by an angular analysis of the decay J/{psi}{yields}{mu}{sup +}{mu}{sup -}. We compare our results with the results of other calculations.

• OSTI ID: 20709365
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B C MESONS
COMPARATIVE EVALUATIONS
DISTRIBUTION
ETA C-2980 MESONS
FORM FACTORS
HELICITY
J PSI-3097 MESONS
MUONS MINUS
MUONS PLUS
NEUTRINOS
QUARK MODEL
RELATIVISTIC RANGE
SEMILEPTONIC DECAY