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Title: Enhancement of Hadronic b Quark Decays

Abstract

A class of previously unknown strong-interaction corrections is found to enhance the rate of nonleptonic decays of the b quark by 5%-8%. This effect decreases the predicted fraction of semileptonic decays and brings it into fair agreement with experimental results. As well as solving a long-standing puzzle of measurements disagreeing with the standard model prediction, our work suggests a way for future precise studies of nonleptonic b quark decays and their application to searching for 'new physics'.

Authors:
 [1];  [2];  [3]
  1. Department of Physics, University of Alberta Edmonton, AB T6G 2J1, Canada and Institute of Nuclear Physics, Academy of Sciences, ul. Radzikowskiego 152, 31-342 Cracow (Poland)
  2. Department of Physics, University of Alberta Edmonton, AB T6G 2J1 (Canada)
  3. Institute for Nuclear Research, Russian Academy of Sciences Moscow, 117312 (Russian Federation)
Publication Date:
OSTI Identifier:
20775226
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 17; Other Information: DOI: 10.1103/PhysRevLett.96.171803; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B QUARKS; CORRECTIONS; HADRONS; SEMILEPTONIC DECAY; STANDARD MODEL; STRONG INTERACTIONS; WEAK HADRONIC DECAY

Citation Formats

Czarnecki, Andrzej, Slusarczyk, Maciej, and Tkachov, Fyodor. Enhancement of Hadronic b Quark Decays. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.96.171803.
Czarnecki, Andrzej, Slusarczyk, Maciej, & Tkachov, Fyodor. Enhancement of Hadronic b Quark Decays. United States. doi:10.1103/PhysRevLett.96.171803.
Czarnecki, Andrzej, Slusarczyk, Maciej, and Tkachov, Fyodor. Fri . "Enhancement of Hadronic b Quark Decays". United States. doi:10.1103/PhysRevLett.96.171803.
@article{osti_20775226,
title = {Enhancement of Hadronic b Quark Decays},
author = {Czarnecki, Andrzej and Slusarczyk, Maciej and Tkachov, Fyodor},
abstractNote = {A class of previously unknown strong-interaction corrections is found to enhance the rate of nonleptonic decays of the b quark by 5%-8%. This effect decreases the predicted fraction of semileptonic decays and brings it into fair agreement with experimental results. As well as solving a long-standing puzzle of measurements disagreeing with the standard model prediction, our work suggests a way for future precise studies of nonleptonic b quark decays and their application to searching for 'new physics'.},
doi = {10.1103/PhysRevLett.96.171803},
journal = {Physical Review Letters},
number = 17,
volume = 96,
place = {United States},
year = {Fri May 05 00:00:00 EDT 2006},
month = {Fri May 05 00:00:00 EDT 2006}
}
  • We discuss within the context of heavy-quark symmetry a program for performing [ital model][minus][ital independent] tests of the factorization scenario proposed by Dugan and Grinstein for hadronic [ital B]-meson decays. Preliminary, [ital model][minus][ital dependent] results for decays to a [ital D] or [ital D][sup *] and one, two, or three pions are presented which indicate that the predictions of factorization are consistent with the present experimental situation. Our results suggest that such decays may not only provide a precision testing ground for factorization, but also an opportunity to study the properties of excited [ital D] mesons and to measure manymore » of the universal form factors of heavy-quark symmetry (including ones not otherwise readily accessible).« less
  • We discuss within the context of heavy-quark symmetry a program for performing model 226 independent tests of the factorization scenario proposed by Dugan and Grinstein for hadronic B-meson decays. Preliminary, model 226 dependent results for decays to a D or D* and one, two, or three pions are presented which indicate that the predictions of factorization are consistent with the present experimental situation. Our results suggest that such decays may not only provide a precision testing ground for factorization, but also an opportunity to study the properties of excited D mesons and to measure many of the universal form factorsmore » of heavy-quark symmetry (including ones not otherwise readily accessible).« less
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  • We present the result of a search for charged Higgs boson decays of the top quark, produced in {ital p{bar p}} collisions at {radical}{ital s}=1.8 TeV. When the charged Higgs boson is heavy and decays to a {tau} lepton, which subsequently decays hadronically, the resulting events have a unique signature: large missing transverse energy and the low-charged-multiplicity {tau}. Data collected in 1992 and 1993 at the Collider Detector at Fermilab, corresponding to 18.7{plus_minus}0.7 pb{sup {minus}1}, exclude new regions of combined top quark and charged Higgs boson mass, in extensions to the standard model with two Higgs doublets. {copyright} {ital 1996more » The American Physical Society.}« less
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