Measurement of ψ(2S) polarisation in pp collisions at √s = 7 TeV: see text] polarisation in [Formula: see text] collisions at [Formula: see text] = 7 TeV

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. Anderson, R. Andreassen, M. AndreottiJ. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, Th Bauer, A. Bay, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

The polarisation of prompt ψ(2S) mesons is measured by performing an angular analysis of ψ(2S) → μ +μ - decays using proton-proton collision data, corresponding to an integrated luminosity of 1.0 fb -1, collected by the LHCb detector at a centre-of-mass energy of 7 TeV. The polarisation is measured in bins of transverse momentum p T and rapidity y in the kinematic region 3.5 < p T < 15 GeV/c and 2.0 < y < 4.5, and is compared to theoretical models. No significant polarisation is observed.

Original languageEnglish
Article number2872
Pages (from-to)1-12
Number of pages12
JournalEuropean Physical Journal C
Volume74
Issue number5
DOIs
Publication statusPublished - Jul 2014
Externally publishedYes

Bibliographical note

Funding Information:
We wish to thank M. Butenschön, B. Gong, H.-S. Shao and Y.-Q. Ma for providing us with the theoretical calculations and helpful discussions. We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); NSFC (China); CNRS/IN2P3 and Region Auvergne (France); BMBF, DFG, HGF and MPG (Germany); SFI (Ireland); INFN (Italy); FOM and NWO (The Netherlands); SCSR (Poland); MEN/IFA (Romania); MinES, Rosatom, RFBR and NRC “Kurchatov Institute” (Russia); MinECo, XuntaGal and GENCAT (Spain); SNSF and SER (Switzerland); NAS Ukraine (Ukraine); STFC (United Kingdom); NSF (USA). We also acknowledge the support received from EPLANET and the ERC under FP7. The Tier1 computing centres are supported by IN2P3 (France), KIT and BMBF (Germany), INFN (Italy), NWO and SURF (The Netherlands), PIC (Spain), GridPP (United Kingdom). We are indebted to the communities behind the multiple open source software packages on which we depend. We are also thankful for the computing resources and the access to software R&D tools provided by Yandex LLC (Russia).

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Fingerprint

Dive into the research topics of 'Measurement of ψ(2S) polarisation in pp collisions at √s = 7 TeV: see text] polarisation in [Formula: see text] collisions at [Formula: see text] = 7 TeV'. Together they form a unique fingerprint.

Cite this