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Title: Measuring B{sub s} width difference at the {Upsilon}(5s) using quantum entanglement

About 90% of B{sub s}B{sub s} pairs produced at the {Upsilon}(5s) resonance are initially B{sub s}{sup *}B{sub s}{sup *} pairs which decay radiatively to B{sub s}B{sub s}. This implies that the B{sub s}B{sub s} pair will then be in an eigenstate of charge conjugation (i.e. C=-1) and therefore in an entangled state. This allows for a determination of {Delta}{Gamma}{sub s}/{Gamma}{sub s} and the CP phase using a number of possible correlations between the decays of the two B{sub s} mesons. In particular, we consider the time integrated correlation, the time ordering asymmetry, and the time ordering-charge asymmetry, which in addition to time ordering distinguishes B{sub s} from B{sub s}, for various combinations of final states. With the statistics of about O(10{sup 7}-10{sup 8}) {Upsilon}(5s) events available at B factories, we find that the time ordering asymmetry between suitably defined hadronic and flavor specific (tagging) decays offers a promising method for determining the width difference. The corresponding time ordering-charge asymmetry can also bound the mixing phase. Similar observables involving exclusive decays are also considered. At the super B factories with O(50) times greater luminosity time ordering and time ordering-charge asymmetries between inclusive and exclusive modes may also provide additional bounds onmore » the phases in those decays.« less
Authors:
;  [1] ;  [2]
  1. Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
21432913
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 82; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevD.82.036003; (c) 2010 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; B S MESONS; CORRELATIONS; FLAVOR MODEL; LUMINOSITY; MESON FACTORIES; MESON-MESON INTERACTIONS; MESONS; MIXING; PAIR PRODUCTION; PARTICLE DECAY; QUANTUM ENTANGLEMENT; RESONANCE ACCELERATORS; BEAUTY MESONS; BEAUTY PARTICLES; BOSONS; COMPOSITE MODELS; DECAY; ELEMENTARY PARTICLES; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; MATHEMATICAL MODELS; MESONS; OPTICAL PROPERTIES; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; PHYSICAL PROPERTIES; PSEUDOSCALAR MESONS; QUARK MODEL; STRANGE MESONS; STRANGE PARTICLES