10.1007-JHEP01(2017)117.pdf (1.09 MB)
Measurements of ?(2S) and X(3872) ? J/?p+p- production in pp collisions at vs=8 TeV with the ATLAS detector
journal contribution
posted on 2023-06-09, 07:12 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, The ATLAS CollaborationDifferential cross sections are presented for the prompt and non-prompt production of the hidden-charm states X(3872) and ?(2S), in the decay mode J/?p+p-, measured using 11.4 fb-1 of pp collisions at vs=8 TeV by the ATLAS detector at the LHC. The ratio of cross-sections X(3872)/?(2S) is also given, separately for prompt and non-prompt components, as well as the non-prompt fractions of X(3872) and ?(2S). Assuming independent single effective lifetimes for non-prompt X(3872) and ?(2S) production gives RB=B(B?X(3872)+any)B(X(3872)?J/?p+p-)B(B??(2S)+any)B(?(2S)?J/?p+p-)=(3.95±0.32(stat)±0.08(sys))×10-2RB=B(B?X(3872)+any)B(X(3872)?J/?p+p-)B(B??(2S)+any)B(?(2S)?J/?p+p-)=(3.95±0.32(stat)±0.08(sys))×10-2 separating short- and long-lived contributions, assuming that the short-lived component is due to Bc decays, gives RB = (3.57 ± 0.33(stat) ± 0.11(sys)) × 10-2, with the fraction of non-prompt X(3872) produced via Bc decays for pT(X(3872)) > 10 GeV being (25 ± 13(stat) ± 2(sys) ± 5(spin))%. The distributions of the dipion invariant mass in the X(3872) and ?(2S) decays are also measured and compared to theoretical predictions.
Funding
ATLAS; G0275; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/I006048/1
History
Publication status
- Published
File Version
- Published version
Journal
Journal of High Energy PhysicsISSN
1126-6708Publisher
Springer VerlagExternal DOI
Issue
1Volume
2017Article number
a117Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Experimental Particle Physics Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-07-14First Open Access (FOA) Date
2017-07-14First Compliant Deposit (FCD) Date
2017-07-14Usage metrics
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