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Titolo:
Bounds on the unitarity triangle, sin 2 beta and K ->pi nu<nu>over bar decays in models with minimal flavor violation - art. no. 115010
Autore:
Buras, AJ; Fleischer, R;
Indirizzi:
Tech Univ Munich, Dept Phys, D-85748 Garching, Germany Tech Univ Munich Garching Germany D-85748 hys, D-85748 Garching, Germany DESY, D-22607 Hamburg, Germany DESY Hamburg Germany D-22607DESY, D-22607 Hamburg, Germany
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 11, volume: 6411, anno: 2001,
pagine: 5010 -
SICI:
0556-2821(200112)6411:11<5010:BOTUTS>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
STANDARD ELECTROWEAK MODEL; LEADING QCD CORRECTIONS; QUARK MASS MATRICES; B-MESON DECAYS; CP-ASYMMETRIES; DISCRETE AMBIGUITIES; CKM MATRIX; TOP-QUARK; K->PI-NU(NU)OVER-BAR; PHYSICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
67
Recensione:
Indirizzi per estratti:
Indirizzo: Buras, AJ Tech Univ Munich, Dept Phys, D-85748 Garching, Germany Tech UnivMunich Garching Germany D-85748 48 Garching, Germany
Citazione:
A.J. Buras e R. Fleischer, "Bounds on the unitarity triangle, sin 2 beta and K ->pi nu<nu>over bar decays in models with minimal flavor violation - art. no. 115010", PHYS REV D, 6411(11), 2001, pp. 5010

Abstract

We present a general discussion of the unitarity triangle from epsilon (K), DeltaM(d,s) and K --> pi nu<(<nu>)over bar> in models with minimal flavorviolation (MFV), allowing for arbitrary signs of the generalized Inami-Limfunctions F-tt and X relevant for (epsilon (K), DeltaM(d,s)) and K --> pi nu<(<nu>)over bar>, respectively. In the models in which F-tt has a sign opposite to the one in the standard model, i.e. F-tt<0, the data for (<epsilon>(K), DeltaM(d,s)) imply an absolute lower bound on the B-d --> psiK(S) CPasymmetry a(psi KS) of 0.69, which is substantially stronger than 0.42 arising in the case of F-tt > 0. An important finding of this paper is the observation that for given Br(K+ --> pi (+) nu<(<nu>)over bar>) and a(psi KS) only two values for Br(K-L --> pi (0) nu<(<nu>)over bar>), corresponding tothe two signs of X, are possible in the full class of MFV models, independently of any new parameters arising in these models. This provides a powerful test for this class of models. Moreover, we derive absolute lower and upper bounds on Br(K-L --> pi (0)nu<(<nu>)over bar>) as functions of Br(K+ --> pi (+) nu<(<nu>)over bar>). Using the present experimental upper bounds on Br(K+ --> pi (+) nu<(<nu>)over bar>) and \V-ub/V-cb\, we obtain the absolute upper bound Br(K-L --> pi (0) nu<(<nu>)over bar>)<7.1 X 10(-10) (90% C.L.).

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Documento generato il 24/01/20 alle ore 12:30:39