MIT Libraries logoDSpace@MIT

MIT
View Item 
  • DSpace@MIT Home
  • MIT Open Access Articles
  • MIT Open Access Articles
  • View Item
  • DSpace@MIT Home
  • MIT Open Access Articles
  • MIT Open Access Articles
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Evidence for collectivity in pp collisions at the LHC

Author(s)
Abercrombie, Daniel Robert; Allen, Brandon Leigh; Apyan, Aram; Barbieri, Richard Alexander; Baty, Austin Alan; Bi, Ran; Bierwagen, Katharina; Brandt, Stephanie Akemi; Cali, Ivan Amos; Busza, Wit; Demiragli, Zeynep; Di Matteo, Leonardo; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hsu, Dylan George; Iiyama, Yutaro; Innocenti, Gian Michele; Klute, Markus; Kovalskyi, Dmytro; Krajczar, Krisztian F.; Lai, Yue Shi; Lee, Yen-Jie; Levin, Andrew D.; Luckey Jr, P David; Marini, Andrea Carlo; McGinn, Christopher Francis; Mironov, Camelia Maria; Narayanan, Siddharth Madhavan; Niu, Xinmei; Paus, Christoph M. E.; Roland, Christof E; Roland, Gunther M; Salfeld-Nebgen, Jakob Maxillian Henry; Stephans, George S. F.; Sumorok, Konstanty C; Tatar, Kaya; Varma, Mukund Madhav; Velicanu, Dragos Alexandru; Veverka, Jan; Wang, J.; Wyslouch, Boleslaw; Yang, Mingming; Wyslouch, Victoria; Wang, Ta-Wei; ... Show more Show less
Thumbnail
Download1-s2.0-S037026931630747X-main.pdf (1.765Mb)
PUBLISHER_CC

Publisher with Creative Commons License

Creative Commons Attribution

Terms of use
Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/
Metadata
Show full item record
Abstract
Measurements of two- and multi-particle angular correlations in pp collisions at √s=5, 7, and 13 TeV are presented as a function of charged-particle multiplicity. The data, corresponding to integrated luminosities of 1.0pb[superscript −1] (5 TeV), 6.2pb[superscript −1] (7 TeV), and 0.7pb[superscript −1] (13 TeV), were collected using the CMS detector at the LHC. The second-order (v[subscript 2]) and third-order (v[subscript 3]) azimuthal anisotropy harmonics of unidentified charged particles, as well as v[subscript 2] of K[superscript 0][subscript s] and Λ/[bar over Λ] particles, are extracted from long-range two-particle correlations as functions of particle multiplicity and transverse momentum. For high-multiplicity pp events, a mass ordering is observed for the v[subscript 2] values of charged hadrons (mostly pions), K[superscript 0][subscript s], and Λ/[bar overΛ], with lighter particle species exhibiting a stronger azimuthal anisotropy signal below p[subscript T] ≈2 GeV/c. For 13 TeV data, the v[subscript 2] signals are also extracted from four- and six-particle correlations for the first time in pp collisions, with comparable magnitude to those from two-particle correlations. These observations are similar to those seen in pPb and PbPb collisions, and support the interpretation of a collective origin for the observed long-range correlations in high-multiplicity pp collisions. Keywords: CMS, Physics, Heavy ion, Ridge, Correlation, pp
Date issued
2017-02
URI
http://hdl.handle.net/1721.1/116653
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physics Letters B
Publisher
Elsevier BV
Citation
Khachatryan, V., et al. “Evidence for Collectivity in Pp Collisions at the LHC.” Physics Letters B, vol. 765, Feb. 2017, pp. 193–220. © 2016 The Authors
Version: Final published version
ISSN
03702693

Collections
  • MIT Open Access Articles

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

Login

Statistics

OA StatisticsStatistics by CountryStatistics by Department
MIT Libraries
PrivacyPermissionsAccessibilityContact us
MIT
Content created by the MIT Libraries, CC BY-NC unless otherwise noted. Notify us about copyright concerns.