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Search for neutral, long-lived particles decaying into two muons in pp[over] collisions at sqrt[s]=1.96 TeV |
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| Authors: | Abazov V M Abbott B Abolins M Acharya B S Adams M Adams T Agelou M Ahn S H Ahsan M Alexeev G D Alkhazov G Alton A Alverson G Alves G A Anastasoaie M Andeen T Anderson S Andrieu B Anzelc M S Arnoud Y Arov M Askew A Asman B Jesus A C S Assis Atramentov O Autermann C Avila C Ay C Badaud F Baden A Bagby L Baldin B Bandurin D V Banerjee P Banerjee S Barberis E Bargassa P Baringer P Barnes C Barreto J Bartlett J F Bassler U Bauer D Bean A Begalli M Begel M Belanger-Champagne C Bellantoni L Bellavance A Benitez J A Beri S B Bernardi G Bernhard R Berntzon L Bertram I Besançon M Beuselinck R |
| Institution: | Joint Institute for Nuclear Research, Dubna, Russia. |
| Abstract: | We present a search for a neutral particle, pair produced in ppover] collisions at sqrts]=1.96 TeV, which decays into two muons and lives long enough to travel at least 5 cm before decaying. The analysis uses approximately 380 pb(-1) of data recorded with the D0 detector. The background is estimated to be about one event. No candidates are observed, and limits are set on the pair-production cross section times branching fraction into dimuons + X for such particles. For a mass of 10 GeV and lifetime of 4x10(-11) s, we exclude values greater than 0.14 pb (95% C.L.). These results are used to limit the interpretation of NuTeV's excess of dimuon events. |
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