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Titolo:
Comparative study of the decays B ->(K,K*)l(+)l(-) in the standard model and supersymmetric theories - art. no. 074024
Autore:
Ali, A; Ball, P; Handoko, LT; Hiller, G;
Indirizzi:
DESY, D-22607 Hamburg, Germany DESY Hamburg Germany D-22607DESY, D-22607 Hamburg, Germany CERN TH, CH-1211 Geneva 23, Switzerland CERN TH Geneva Switzerland 23CERN TH, CH-1211 Geneva 23, Switzerland LIPI, Lab Theoret Phys & Math, Tangerang 15310, Indonesia LIPI TangerangIndonesia 15310 t Phys & Math, Tangerang 15310, Indonesia Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy Ist Nazl FisNucl Frascati Italy I-00044 ascati, I-00044 Frascati, Italy
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 7, volume: 6107, anno: 2000,
pagine: 4024 -
SICI:
0556-2821(20000401)6107:7<4024:CSOTDB>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
RARE B-DECAYS; HADRONIC FORM-FACTORS; HEAVY-QUARK LIMIT; QUANTUM CHROMODYNAMICS; LEPTON POLARIZATION; EXCLUSIVE PROCESSES; LEADING LOGARITHMS; SUPERGRAVITY MODEL; QCD-CORRECTIONS; VERTICAL-BAR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
89
Recensione:
Indirizzi per estratti:
Indirizzo: Ali, A DESY, Notkestr 85, D-22607 Hamburg, Germany DESY Notkestr 85 Hamburg Germany D-22607 D-22607 Hamburg, Germany
Citazione:
A. Ali et al., "Comparative study of the decays B ->(K,K*)l(+)l(-) in the standard model and supersymmetric theories - art. no. 074024", PHYS REV D, 6107(7), 2000, pp. 4024

Abstract

Using improved theoretical calculations of the decay form factors in the Light cone QCD sum rule approach, we investigate the decay rates, dilepton invariant mass spectra and the forward-backward (FB) asymmetry in the decaysB --> (K,K*)l(+) l(-) (l(+/-) = e(+/-), mu(+/-), tau(+/-)) in the standardmodel (SM) and a number of popular variants of the supersymmetric (SUSY) models. Theoretical precision on the differential decay rates and FB asymmetry is estimated in these theories taking into account various parametric uncertainties. We show that existing data on B --> X-s gamma and the experimental upper limit on the branching ratio beta(B --> K* mu(+) mu(-)) provide interesting bounds on the coefficients of the underlying effective theory. We argue that the FB asymmetry in B --> K* l(+) l(-) constitutes a precision test of the SM and its measurement in forthcoming experiments may reveal new physics. in particular, the presently allowed large-tan beta solutions in SUGRA models, as well as more general flavor-violating SUSY models, yield FB asymmetries which are characteristically different from the corresponding ones in the SM.

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Documento generato il 06/04/20 alle ore 21:52:21