Publication
Measurement of the production cross section ratio $\sigma$(Xb2(1P)) / $\sigma$(Xb1(1P) in pp collisions at $\sqrt s $ = 8 TeV
| dc.contributor.author | CMS collaboration (2147 authors) | |
| dc.contributor.author | Hollar, Jonathan | |
| dc.contributor.author | Nayak, Aruna | |
| dc.contributor.author | Bargassa, Pedrame | |
| dc.contributor.author | Beirão Da Cruz E Silva, Cristóvão | |
| dc.contributor.author | Faccioli, Pietro | |
| dc.contributor.author | Ferreira Parracho, Pedro Guilherme | |
| dc.contributor.author | Gallinaro, Michele | |
| dc.contributor.author | Nguyen, Federico | |
| dc.contributor.author | Rodrigues Antunes, Joao | |
| dc.contributor.author | Seixas, Joao | |
| dc.contributor.author | Varela, Joao | |
| dc.contributor.author | Vischia, Pietro | |
| dc.contributor.author | Lloret Iglesias, Lara | |
| dc.contributor.author | David Tinoco Mendes, Andre | |
| dc.contributor.author | Musella, Pasquale | |
| dc.contributor.author | Silva, Pedro | |
| dc.contributor.author | Pela, Joao | |
| dc.contributor.author | Leonardo, Nuno | |
| dc.date.accessioned | 2019-02-04T04:59:14Z | |
| dc.date.available | 2019-02-04T04:59:14Z | |
| dc.date.issued | 2015-04-09 | |
| dc.date.updated | 2019-02-04T04:59:14Z | |
| dc.description.abstract | A measurement of the production cross section ratio σ(χb2(1P))/σ(χb1(1P)) is presented. The χb1(1P) and χb2(1P) bottomonium states, promptly produced in pp collisions at s=8 TeV , are detected by the CMS experiment at the CERN LHC through their radiative decays χb1,2(1P)→ϒ(1S)+γ . The emitted photons are measured through their conversion to e+e− pairs, whose reconstruction allows the two states to be resolved. The ϒ(1S) is measured through its decay to two muons. An event sample corresponding to an integrated luminosity of 20.7 fb−1 is used to measure the cross section ratio in a phase-space region defined by the photon pseudorapidity, |ηγ|<1.0 ; the ϒ(1S) rapidity, |yϒ|<1.5 ; and the ϒ(1S) transverse momentum, 7<pTϒ<40 GeV . The cross section ratio shows no significant dependence on the ϒ(1S) transverse momentum, with a measured average value of 0.85±0.07(stat+syst)±0.08(BF) , where the first uncertainty is the combination of the experimental statistical and systematic uncertainties and the second is from the uncertainty in the ratio of the χb branching fractions. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Lett. B743 (2015) 383-402; DOI 10.1016/j.physletb.2015.02.048 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physletb.2015.02.048 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26691 | |
| dc.language.iso | eng | |
| dc.title | Measurement of the production cross section ratio $\sigma$(Xb2(1P)) / $\sigma$(Xb1(1P) in pp collisions at $\sqrt s $ = 8 TeV | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |