Please use this identifier to cite or link to this item:
http://idr.niser.ac.in:8080/jspui/handle/123456789/1041
Title: | Measurement of the prompt J/ψ and ψ(2S) polarizations in pp collisions at √s=7 TeV |
Authors: | Swain, Sanjay Kumar |
Keywords: | CMS Physics Quarkonium production Quarkonium polarization |
Issue Date: | 18-Dec-2013 |
Publisher: | Physics Letters B |
Citation: | Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., … Swanson, J. (2013). Measurement of the prompt J/ψ and ψ(2S) polarizations in pp collisions at s=7 TeV. Physics Letters. Part B, 727(4–5), 381–402. |
Abstract: | The polarizations of prompt J/ψ and ψ(2S) mesons are measured in proton–proton collisions at √s= 7 TeV, using a dimuon data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.9 fb−1. Theprompt J/ψ and ψ(2S) polarization parameters λϑ, λϕ, andλϑϕ, as well as the frame-invariant quantity ˜ λ, are measured from the dimuon decay angular distributions in three different polarization frames. The J/ψ results are obtained in the transverse momentum range 14 < pT < 70 GeV, in the rapidity intervals |y| < 0.6 and0.6 < |y| < 1.2. The corresponding ψ(2S) results cover 14 < pT < 50 GeV and include a third rapidity bin, 1.2 < |y| < 1.5. No evidence of large polarizations is seen in these kinematic regions, which extend much beyond those previously explored. |
URI: | https://doi.org/10.1016/j.physletb.2013.10.055 http://idr.niser.ac.in:8080/jspui/handle/123456789/1041 |
Appears in Collections: | Journal Papers |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.