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Titolo:
Constraining models with vector-like fermions from FCNC in K and B physics
Autore:
Barenboim, G; Botella, FJ; Vives, O;
Indirizzi:
CERN, Div Theory, CH-1211 Geneva 23, Switzerland CERN Geneva Switzerland23 N, Div Theory, CH-1211 Geneva 23, Switzerland Fermilab Theory Grp, Batavia, IL 60510 USA Fermilab Theory Grp Batavia ILUSA 60510 heory Grp, Batavia, IL 60510 USA Univ Valencia, Dept Fis Teor, CSIC, E-46100 Burjassot, Spain Univ Valencia Burjassot Spain E-46100 or, CSIC, E-46100 Burjassot, Spain Univ Valencia, IFIC, CSIC, E-46100 Burjassot, Spain Univ Valencia Burjassot Spain E-46100 IC, CSIC, E-46100 Burjassot, Spain
Titolo Testata:
NUCLEAR PHYSICS B
fascicolo: 1-2, volume: 613, anno: 2001,
pagine: 285 - 305
SICI:
0550-3213(20011008)613:1-2<285:CMWVFF>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
KOBAYASHI-MASKAWA MATRIX; BROKEN SUPERSYMMETRIC THEORIES; CHANGING NEUTRAL CURRENTS; CS-VERTICAL-BAR; CP ASYMMETRIES; STANDARD MODEL; DECAY K+->PI(+)NU(NU)OVER-BAR; E-6 UNIFICATION; CHIRAL LIMIT; W-DECAYS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
85
Recensione:
Indirizzi per estratti:
Indirizzo: Barenboim, G CERN, Div Theory, CH-1211 Geneva 23, Switzerland CERN Geneva Switzerland 23 , CH-1211 Geneva 23, Switzerland
Citazione:
G. Barenboim et al., "Constraining models with vector-like fermions from FCNC in K and B physics", NUCL PHYS B, 613(1-2), 2001, pp. 285-305

Abstract

In this work we update the constraints on tree level FCNC couplings in theframework of a theory with n isosinglet vector-like down quarks. In this context, we emphasize the sensitivity of the B J/psi K-S CP asymmetry to thepresence of new vector-like down quarks. This CP asymmetry, together with the rare decays B --> X(s,d)l (l) over bar and K --> pi nu<(<nu>)over bar> are the best options to further constrain the FCNC tree level couplings or even to point out, in the near future, the possible presence of vector-likequarks in the low energy spectrum, as suggested by GUT theories or models of large extra dimensions at the TeV scale. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 23/01/20 alle ore 07:05:14