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Title: Search for the rare decay B0(s)---> phi mu+ mu- with the D0 detector

Abstract

The authors present a search for the flavor-changing neutral current decay B{sub s}{sup 0} {yields} {phi}{mu}{sup +}{mu}{sup -} using about 0.45 fb{sup -1} of data collected in p{bar p} collisions at {radical}s = 1.96 TeV with the D0 detector at the Fermilab Tevatron Collider. They find an upper limit on the branching ratio of this decay normalized to B{sub s}{sup 0} {yields} J/{psi}{phi} of {Beta}(B{sub s}{sup 0} {yields} {phi}{mu}{sup +}{mu}{sup -})/{Beta}(B{sub s}{sup 0} {yields} J/{psi}{phi}) < 4.4 x 10{sup -3} at the 95% C.L. Using the central value of the world average branching fraction of B{sub s}{sup 0} {yields} J/{psi}{phi}, the limit corresponds to {Beta}(B{sub s}{sup 0} {yields} {phi}{mu}{sup +}{mu}{sup -}) < 4.1 x 10{sup -6} at the 95% C.L., the most stringent upper bound to date.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
892511
Report Number(s):
FERMILAB-PUB-06-073-E
Journal ID: ISSN 0556-2821; PRVDAQ; arXiv eprint number hep-ex/0604015; TRN: US200711%%470
DOE Contract Number:
AC02-76CH03000
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys.Rev.D74:031107,2006; Journal Volume: 74
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANCHING RATIO; DECAY; FERMILAB TEVATRON; NEUTRAL CURRENTS; Experiment-HEP

Citation Formats

Abazov, V.M., Abbott, B., Abolins, M., Acharya, B.S., Adams, M., Adams, T., Agelou, M., Agram, J.-L., Ahn, S.H., Ahsan, M., Alexeev, G.D., and /Buenos Aires U. /Rio de Janeiro, CBPF /Rio de Janeiro State U. /Sao Paulo, IFT /Alberta U. /Simon Fraser U. /York U., Canada /McGill U. /Beijing, Inst. High Energy Phys. /Hefei, CUST /Andes U., Bogota. Search for the rare decay B0(s)---> phi mu+ mu- with the D0 detector. United States: N. p., 2006. Web. doi:10.1103/PhysRevD.74.031107.
Abazov, V.M., Abbott, B., Abolins, M., Acharya, B.S., Adams, M., Adams, T., Agelou, M., Agram, J.-L., Ahn, S.H., Ahsan, M., Alexeev, G.D., & /Buenos Aires U. /Rio de Janeiro, CBPF /Rio de Janeiro State U. /Sao Paulo, IFT /Alberta U. /Simon Fraser U. /York U., Canada /McGill U. /Beijing, Inst. High Energy Phys. /Hefei, CUST /Andes U., Bogota. Search for the rare decay B0(s)---> phi mu+ mu- with the D0 detector. United States. doi:10.1103/PhysRevD.74.031107.
Abazov, V.M., Abbott, B., Abolins, M., Acharya, B.S., Adams, M., Adams, T., Agelou, M., Agram, J.-L., Ahn, S.H., Ahsan, M., Alexeev, G.D., and /Buenos Aires U. /Rio de Janeiro, CBPF /Rio de Janeiro State U. /Sao Paulo, IFT /Alberta U. /Simon Fraser U. /York U., Canada /McGill U. /Beijing, Inst. High Energy Phys. /Hefei, CUST /Andes U., Bogota. Sat . "Search for the rare decay B0(s)---> phi mu+ mu- with the D0 detector". United States. doi:10.1103/PhysRevD.74.031107. https://www.osti.gov/servlets/purl/892511.
@article{osti_892511,
title = {Search for the rare decay B0(s)---> phi mu+ mu- with the D0 detector},
author = {Abazov, V.M. and Abbott, B. and Abolins, M. and Acharya, B.S. and Adams, M. and Adams, T. and Agelou, M. and Agram, J.-L. and Ahn, S.H. and Ahsan, M. and Alexeev, G.D. and /Buenos Aires U. /Rio de Janeiro, CBPF /Rio de Janeiro State U. /Sao Paulo, IFT /Alberta U. /Simon Fraser U. /York U., Canada /McGill U. /Beijing, Inst. High Energy Phys. /Hefei, CUST /Andes U., Bogota},
abstractNote = {The authors present a search for the flavor-changing neutral current decay B{sub s}{sup 0} {yields} {phi}{mu}{sup +}{mu}{sup -} using about 0.45 fb{sup -1} of data collected in p{bar p} collisions at {radical}s = 1.96 TeV with the D0 detector at the Fermilab Tevatron Collider. They find an upper limit on the branching ratio of this decay normalized to B{sub s}{sup 0} {yields} J/{psi}{phi} of {Beta}(B{sub s}{sup 0} {yields} {phi}{mu}{sup +}{mu}{sup -})/{Beta}(B{sub s}{sup 0} {yields} J/{psi}{phi}) < 4.4 x 10{sup -3} at the 95% C.L. Using the central value of the world average branching fraction of B{sub s}{sup 0} {yields} J/{psi}{phi}, the limit corresponds to {Beta}(B{sub s}{sup 0} {yields} {phi}{mu}{sup +}{mu}{sup -}) < 4.1 x 10{sup -6} at the 95% C.L., the most stringent upper bound to date.},
doi = {10.1103/PhysRevD.74.031107},
journal = {Phys.Rev.D74:031107,2006},
number = ,
volume = 74,
place = {United States},
year = {Sat Apr 01 00:00:00 EST 2006},
month = {Sat Apr 01 00:00:00 EST 2006}
}
  • We present a search for the flavor-changing neutral current decay B{sub s}{sup 0}{yields}{phi}{mu}{sup +}{mu}{sup -} using about 0.45 fb{sup -1} of data collected in pp collisions at {radical}(s)=1.96 TeV with the D0 detector at the Fermilab Tevatron Collider. We find an upper limit on the branching ratio of this decay normalized to B{sub s}{sup 0}{yields}J/{psi}{phi} of (B(B{sub s}{sup 0}{yields}{phi}{mu}{sup +}{mu}{sup -})/B(B{sub s}{sup 0}{yields}J/{psi}{phi}))<4.4x10{sup -3} at the 95% C.L. Using the central value of the world average branching fraction of B{sub s}{sup 0}{yields}J/{psi}{phi}, the limit corresponds to B(B{sub s}{sup 0}{yields}{phi}{mu}{sup +}{mu}{sup -})<4.1x10{sup -6} at the 95% C.L., the most stringent uppermore » bound to date.« less
  • We search for b{yields}s{mu}{sup +}{mu}{sup -} transitions in B meson (B{sup +}, B{sup 0}, or B{sub s}{sup 0}) decays with 924 pb{sup -1} of pp collisions at {radical}(s)=1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. We find excesses with significances of 4.5, 2.9, and 2.4 standard deviations in the B{sup +}{yields}{mu}{sup +}{mu}{sup -}K{sup +}, B{sup 0}{yields}{mu}{sup +}{mu}{sup -}K*(892){sup 0}, and B{sub s}{sup 0}{yields}{mu}{sup +}{mu}{sup -}{phi} decay modes, respectively. Using B{yields}J/{psi}h (h=K{sup +}, K*(892){sup 0}, {phi}) decays as normalization channels, we report branching fractions for the previously observed B{sup +} and B{sup 0} decays, B(B{sup +}{yields}{mu}{sup +}{mu}{supmore » -}K{sup +})=(0.59{+-}0.15{+-}0.04)x10{sup -6}, and B(B{sup 0}{yields}{mu}{sup +}{mu}{sup -}K*(892){sup 0})=(0.81{+-}0.30{+-}0.10)x10{sup -6}, where the first uncertainty is statistical, and the second is systematic. We set an upper limit on the relative branching fraction B(B{sub s}{sup 0}{yields}{mu}{sup +}{mu}{sup -}{phi})/B(B{sub s}{sup 0}{yields}J/{psi}{phi})<2.6(2.3)x10{sup -3} at the 95(90)% confidence level, which is the most stringent to date.« less
  • No abstract prepared.
  • A search for lepton-flavor-violating process e{sup +}e{sup -{yields}}e{mu} in the energy region {radical}(s)=984-1060 MeV with the SND detector at the VEPP-2M e{sup +}e{sup -} collider is reported. The model independent 90% C.L. upper limits on the e{sup +}e{sup -{yields}}e{mu} cross section, {sigma}{sub e{mu}<}8 pb, as well as on the corresponding {phi}{yields}e{mu} branching fraction, B({phi}{yields}e{mu})<2x10{sup -6} have been obtained, for the polar angles 55 deg. <{theta}<125 deg. of the final particles.
  • We present searches for the rare decay modes D{sup 0} {yields} e{sup +}e{sup -}, D{sup 0} {yields} {mu}{sup +}{mu}{sup -}, and D{sup 0} {yields} e{sup {+-}}{mu}{sup {-+}} in continuum e{sup +}e{sup -} {yields} c{bar c} events recorded by the BABAR detector in a data sample that corresponds to an integrated luminosity of 468 fb{sup -1}. These decays are highly GIM suppressed but may be enhanced in several extensions of the Standard Model. Our observed event yields are consistent with the expected backgrounds. An excess is seen in the D{sup 0} {yields} {mu}{sup +}{mu}{sup -} channel, although the observed yield ismore » consistent with an upward background fluctuation at the 5% level. Using the Feldman-Cousins method, we set the following 90% confidence level intervals on the branching fractions: {Beta}(D{sup 0} {yields} e{sup +}e{sup -}) < 1.7 x 10{sup -7}, {Beta}(D{sup 0} {yields} {mu}{sup +}{mu}{sup -}) within [0.6, 8.1] x 10{sup -7}, and {Beta}(D{sup 0} {yields} e{sup {+-}}{mu}{sup {-+}}) < 3.3 x 10{sup -7}.« less