Observation of Z production in proton-lead collisions at LHCb

LHCb Collaboration, R. Aaij*, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, 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. AndersonR. Andreassen, M. Andreotti, J. 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, V. Battista, Laurence Carson, P. E. L. Clarke, G. A. Cowan, Daniel Craik, S. Eisenhardt, Silvia Gambetta, F. Muheim, M. Needham, S. Playfer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The first observation of Z boson production in proton-lead collisions at a centre-of-mass energy per proton-nucleon pair of root(s) N N = 5TeV is presented. The data sample corresponds to an integrated luminosity of 1.6 nb(-1) collected with the LHCb detector. The Z candidates are reconstructed from pairs of oppositely charged muons with pseudorapidities between 2.0 and 4.5 and transverse momenta above 20 GeV/c. The invariant dimuon mass is restricted to the range 60-120 GeV/c. The Z production cross-section is measured to be

sigma(Z ->mu+mu-) (fwd) = 13.5(-4.0)(+5.4)(stat.) +/- 1.2(syst.) nb

in the direction of the proton beam and

sigma(Z ->mu+mu-) (bwd) = 10.7(-5.1)(+8.4)(stat.) +/- 1.0(syst.) nb

in the direction of the lead beam, where the first uncertainty is statistical and the second systematic.

Original languageEnglish
Article number030
Number of pages18
JournalJournal of High Energy Physics
Issue number9
DOIs
Publication statusPublished - 3 Sep 2014

Keywords

  • Electroweak interaction
  • Heavy Ions
  • Heavy-ion collision
  • Particle and resonance production
  • Forward physics
  • PARTON DISTRIBUTIONS
  • BOSON PRODUCTION
  • HIGH ENERGIES
  • NUCLEAR PDFS
  • DEUTERIUM
  • DECAY

Fingerprint

Dive into the research topics of 'Observation of Z production in proton-lead collisions at LHCb'. Together they form a unique fingerprint.

Cite this