2024-03-28T22:30:58Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1256292016-02-18T03:24:24Zcom_10261_61com_10261_4col_10261_314
Babar Collaboration
Lees, J. P.
Martínez-Vidal, Fernando
Oyanguren, Arantza
Villanueva-Pérez, P.
2015-11-24T12:02:08Z
2015-11-24T12:02:08Z
2013-02-15
Physical Review - Section D - Particles and Fields 87 (3): 031102 - 8 (2013)
1550-7998
http://hdl.handle.net/10261/125629
10.1103/PhysRevD.87.031102
1550-2368
http://dx.doi.org/10.13039/100000001
http://dx.doi.org/10.13039/501100000038
http://dx.doi.org/10.13039/501100001659
http://dx.doi.org/10.13039/501100000271
http://dx.doi.org/10.13039/501100001712
We search for di-muon decays of a low-mass Higgs boson (A(0)) produced in radiative Gamma(1S) decays. The Gamma(1S) sample is selected by tagging the pion pair in the Gamma(2S, 3S) -> pi(+)pi(-) Gamma(1S) transitions, using a data sample of 92.8 x 10(6) Gamma(2S) and 116.8 x 10(6) Gamma(3S) events collected by the BABAR detector. We find no evidence for A(0) production and set 90% confidence level upper limits on the product branching fraction B(Gamma(1S) -> gamma Lambda(0)) x B(Lambda(0)->mu(+)mu(-)) in the range of (0.28 - 9.7) x 10(-6) for 0.212 <= m(A0) <= 9.20 GeV/c(2). The results are combined with our previous measurements of Gamma(2S,3S) -> gamma Lambda(0), Lambda(0) -> mu(+)mu(-) to set limits on the effective coupling of the b quark to the Lambda(0).
eng
openAccess
Leptonic decays
Quarkonium
Search for di-muon decays of a low-mass Higgs boson in radiative decays of the Gamma(1S)
artículo