@article{10902/13960,
year = {2015},
month = {4},
url = {http://hdl.handle.net/10902/13960},
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 vs=8TeV, 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 20.7fb-1is used to measure the cross section ratio in a phase-space region defined by the photon pseudorapidity, ,|ηγ|<1.0;theΥ(1S) rapidity,|yΥ|<1.5;and the Υ(1S) transverse momentum,7<pΥT<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.},
publisher = {Elsevier},
publisher = {Physics Letters B, Vol. 743, Pp. 383–402, (2015)},
title = {Measurement of the production cross section ratio σ χb2(1P))/ σ (χb1(1P)) in pp collisions at √s=8TeV},
author = {Khachatryan, Vladimir and Brochero Cifuentes, Javier Andrés and Cabrillo Bartolomé, José Iban and Calderón Tazón, Alicia and Duarte Campderros, Jorge and Fernández García, Marcos and Gómez Gramuglio, Gervasio and Graziano, Alberto and López Virto, María Amparo and Marco de Lucas, Jesús and Marco de Lucas, Rafael José and Martínez Rivero, Celso and Matorras Weinig, Francisco and Muñoz Sánchez, Francisca Javiela and Piedra Gómez, Jonatan and Rodrigo Anoro, Teresa and Rodríguez Marrero, Ana Yaiza and Ruiz Jimeno, Alberto and Scodellaro, Luca and Vila Álvarez, Iván  and Vilar Cortabitarte, Rocío},
}