caa a22 4500 528782630 20190606031545.0 cr unu---uuuuu 180924e20150409xx s 000 0 eng 10.3929/ethz-b-000100902 doi 10.1016/j.physletb.2015.02.048 doi (ETHRESEARCH)oai:www.research-collection.ethz.ch:20.500.11850/100902 Measurement of the production cross section ratio σ(χb2(1P))/σ(χb1(1P)) in pp collisions at √s=8  TeV [Elektronische Daten] [CMS Collaboration, Vardan Khachatryan, Felix Bachmair, Lukas Bäni, Lorenzo Bianchini, Pierluigi Bortignon, Marco A. Buchmann, Bruno Casal, Nicolas Chanon, Amanda Deisher, Günther Dissertori, Michael Dittmar, Mauro Donegà, Marc Dünser, Philipp Eller, Christophorus; id_orcid 0000-0002-6182-3380 Grab, Dmitry Hits, Werner Lustermann, Boris Mangano, Andrea C. Marini, Pablo Martinez Ruiz del Arbol, Daniel Meister, Niklas Mohr, Christoph Nägeli, Francesca Nessi-Tedaldi, Francesco Pandolfi, Felicitas Pauss, Marco Peruzzi, Milena Quittnat, Liis Rebane, Marco Rossini, Andrey Starodumov, Maiko Takahashi, Konstantinos Theofilatos, Rainer; id_orcid 0000-0001-8038-1613 Wallny, Hannsjörg A. Weber, et al.] Phys. Lett. B Open access ethresearch A measurement of the production cross section ratio sigma(chi b2(1P))/sigma(chi b1(1P)) is presented. The chi b1 (1P) and chi b2 (1P) bottomonium states, promptly produced in pp collisions at root s = 8TeV, are detected by the CMS experiment at the CERN LHC through their radiative decays chi b1,2(1P) -> Y(1S) + gamma. The emitted photons are measured through their conversion to e(+) e(-) pairs, whose reconstruction allows the two states to be resolved. The Y(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, vertical bar eta(gamma)vertical bar < 1.0; the Y(1S) rapidity, vertical bar y(Y)vertical bar < 1.5; and the Y(1S) transverse momentum, 7 < p(T)(Y) < 40 GeV. The cross section ratio shows no significant dependence on the.(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 chi b branching fractions. Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0 ethresearch CMS ethresearch Quarkonium production ethresearch P-wave states ethresearch Bottomonium ethresearch CMS Collaboration joint author Khachatryan Vardan joint author Bachmair Felix joint author Bäni Lukas joint author Bianchini Lorenzo joint author Bortignon Pierluigi joint author Buchmann Marco A. joint author Casal Bruno joint author Chanon Nicolas joint author Deisher Amanda joint author Dissertori Günther joint author Dittmar Michael joint author Donegà Mauro joint author Dünser Marc joint author Eller Philipp joint author Grab Christophorus; id_orcid 0000-0002-6182-3380 joint author Hits Dmitry joint author Lustermann Werner joint author Mangano Boris joint author Marini Andrea C. joint author Martinez Ruiz del Arbol Pablo joint author Meister Daniel joint author Mohr Niklas joint author Nägeli Christoph joint author Nessi-Tedaldi Francesca joint author Pandolfi Francesco joint author Pauss Felicitas joint author Peruzzi Marco joint author Quittnat Milena joint author Rebane Liis joint author Rossini Marco joint author Starodumov Andrey joint author Takahashi Maiko joint author Theofilatos Konstantinos joint author Wallny Rainer; id_orcid 0000-0001-8038-1613 joint author Weber Hannsjörg A. joint author et al. joint author Physics Letters B Amsterdam : Elsevier 743, pp. 383-402 0370-2693 http://hdl.handle.net/20.500.11850/100902 text/html WWW-Backlink auf das Repository (Open access) 1 Journal Article ethresearch ETHRESEARCH 856 40 http://hdl.handle.net/20.500.11850/100902 text/html WWW-Backlink auf das Repository (Open access) ETHRESEARCH 700 -- CMS Collaboration joint author ETHRESEARCH 700 1- Khachatryan Vardan joint author ETHRESEARCH 700 1- Bachmair Felix joint author ETHRESEARCH 700 1- Bäni Lukas joint author ETHRESEARCH 700 1- Bianchini Lorenzo joint author ETHRESEARCH 700 1- Bortignon Pierluigi joint author ETHRESEARCH 700 1- Buchmann Marco A. joint author ETHRESEARCH 700 1- Casal Bruno joint author ETHRESEARCH 700 1- Chanon Nicolas joint author ETHRESEARCH 700 1- Deisher Amanda joint author ETHRESEARCH 700 1- Dissertori Günther joint author ETHRESEARCH 700 1- Dittmar Michael joint author ETHRESEARCH 700 1- Donegà Mauro joint author ETHRESEARCH 700 1- Dünser Marc joint author ETHRESEARCH 700 1- Eller Philipp joint author ETHRESEARCH 700 1- Grab Christophorus; id_orcid 0000-0002-6182-3380 joint author ETHRESEARCH 700 1- Hits Dmitry joint author ETHRESEARCH 700 1- Lustermann Werner joint author ETHRESEARCH 700 1- Mangano Boris joint author ETHRESEARCH 700 1- Marini Andrea C. joint author ETHRESEARCH 700 1- Martinez Ruiz del Arbol Pablo joint author ETHRESEARCH 700 1- Meister Daniel joint author ETHRESEARCH 700 1- Mohr Niklas joint author ETHRESEARCH 700 1- Nägeli Christoph joint author ETHRESEARCH 700 1- Nessi-Tedaldi Francesca joint author ETHRESEARCH 700 1- Pandolfi Francesco joint author ETHRESEARCH 700 1- Pauss Felicitas joint author ETHRESEARCH 700 1- Peruzzi Marco joint author ETHRESEARCH 700 1- Quittnat Milena joint author ETHRESEARCH 700 1- Rebane Liis joint author ETHRESEARCH 700 1- Rossini Marco joint author ETHRESEARCH 700 1- Starodumov Andrey joint author ETHRESEARCH 700 1- Takahashi Maiko joint author ETHRESEARCH 700 1- Theofilatos Konstantinos joint author ETHRESEARCH 700 1- Wallny Rainer; id_orcid 0000-0001-8038-1613 joint author ETHRESEARCH 700 1- Weber Hannsjörg A. joint author ETHRESEARCH 700 -- et al joint author ETHRESEARCH 773 0- Physics Letters B Amsterdam : Elsevier 743, pp. 383-402 0370-2693 SWISSBIB 514360585 BK010053 XK010053 XK010000 ETHRESEARCH ETHRESEARCH ETHRESEARCH Journal Article Open access