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Titolo:
Charmless two body hadronic decays of the Lambda(b) baryon - art. no. 074001
Autore:
Mohanta, R; Giri, AK; Khanna, MP;
Indirizzi:
Panjab Univ, Dept Phys, Chandigarh 160014, India Panjab Univ Chandigarh India 160014 Dept Phys, Chandigarh 160014, India
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 7, volume: 6307, anno: 2001,
pagine: 4001 -
SICI:
0556-2821(20010401)6307:7<4001:CTBHDO>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROTON-ANTIPROTON COLLIDER; NONLEPTONIC DECAYS; LEADING LOGARITHMS; 2-BODY DECAYS; WEAK DECAYS; B-DECAYS; CP ASYMMETRIES; MESONS; FACTORIZATION; VIOLATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Mohanta, R Panjab Univ, Dept Phys, Chandigarh 160014, India Panjab Univ Chandigarh India 160014 Chandigarh 160014, India
Citazione:
R. Mohanta et al., "Charmless two body hadronic decays of the Lambda(b) baryon - art. no. 074001", PHYS REV D, 6307(7), 2001, pp. 4001

Abstract

Using a theoretical framework based on the next-to-leading order QCD improved effective Hamiltonian, we have estimated the branching ratios and asymmetry parameters for the two body charmless nonleptonic decay modes of the Lambda (b) baryon, i.e., Lambda (b)-->p(pi/rho), p(K/K*), and Lambda(pi/rho), within the framework of generalized factorization. The nonfactorizable contributions are parametrized in terms of the effective number of colors, N-c(eff). So, in addition to the naive factorization approach (N-c(eff) = 3),here we have taken two more values for N-c(eff); i.e., N-c(eff) = 2 and infinity. The baryonic form factors at maximum momentum transfer (q(m)(2)) are evaluated using the nonrelativistic quark model and the extrapolation of the form factors from q(m)(2) to the required q(2) value is done by assuming pole dominance. The obtained branching ratios for Lambda (b) -->p pi, pK processes lie within the present experimental upper limit.

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Documento generato il 20/01/20 alle ore 04:50:44