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Title: A comparative study of the decays B to (K,K*) ell{sup +} ell{sup -} in standard model and supersymmetric theories

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 decays B ---> (K, K*)l{sup +}l{sup -} (l{sup {+-}} = e{sup {+-}}, tau{sup {+-}}) in the standard model (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{sub s}gamma and the experimental upper limit on the branching ratio B(B ---> K* mu{sup +}mu{sup -}) provide interesting bounds on the coefficients of the underlying effective theory. We argue that the FB-asymmetry in B ---> K*l{sup +}l{sup -} 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.

Authors:
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
15075
Report Number(s):
SLAC-PUB-8269
TRN: US0204533
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 7 Oct 1999
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BRANCHING RATIO; DECAY; ENERGY; FORM FACTORS; MASS SPECTRA; PHYSICS; STANDARD MODEL; SUM RULES

Citation Formats

Hiller, Gudrun. A comparative study of the decays B to (K,K*) ell{sup +} ell{sup -} in standard model and supersymmetric theories. United States: N. p., 1999. Web. doi:10.2172/15075.
Hiller, Gudrun. A comparative study of the decays B to (K,K*) ell{sup +} ell{sup -} in standard model and supersymmetric theories. United States. https://doi.org/10.2172/15075
Hiller, Gudrun. 1999. "A comparative study of the decays B to (K,K*) ell{sup +} ell{sup -} in standard model and supersymmetric theories". United States. https://doi.org/10.2172/15075. https://www.osti.gov/servlets/purl/15075.
@article{osti_15075,
title = {A comparative study of the decays B to (K,K*) ell{sup +} ell{sup -} in standard model and supersymmetric theories},
author = {Hiller, Gudrun},
abstractNote = {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 decays B ---> (K, K*)l{sup +}l{sup -} (l{sup {+-}} = e{sup {+-}}, tau{sup {+-}}) in the standard model (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{sub s}gamma and the experimental upper limit on the branching ratio B(B ---> K* mu{sup +}mu{sup -}) provide interesting bounds on the coefficients of the underlying effective theory. We argue that the FB-asymmetry in B ---> K*l{sup +}l{sup -} 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.},
doi = {10.2172/15075},
url = {https://www.osti.gov/biblio/15075}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Oct 07 00:00:00 EDT 1999},
month = {Thu Oct 07 00:00:00 EDT 1999}
}