Quick search Find article
Quick search
Find article

Measurement of J/ψ helicity distributions in inelastic photoproduction at HERA

ZEUS collaboration



The J/ψ decay angular distributions have been measured in inelastic photoproduction in ep collisions with the ZEUS detector at HERA, using an integrated luminosity of 468 pb−1. The range in photon-proton centre-of-mass energy, W, was 50 < W < 180 GeV. The J/ψ mesons were identified through their decay into muon pairs. The polar and azimuthal angles of the μ+ were measured in the J/ψ rest frame and compared to theoretical predictions at leading and next-to-leading order in QCD.

Keywords

Lepton-Nucleon Scattering

 

E-print Number: 0906.1424

Cited: by |

Refers: to

PACS

13.60.Le Meson production

12.38.Bx Perturbative calculations

13.20.Gd Decays of J/psi, Upsilon, and other quarkonia

14.40.Gx Mesons with S=C=B=0, mass>2.5 GeV (including quarkonia)

11.30.Er Charge conjugation, parity, time reversal, and other discrete symmetries

Subjects

Particle physics and field theory

Dates

Issue 12 (December 2009)

Received 10 June 2009, accepted for publication 16 November 2009

Published 1 December 2009



  1. Measurement of J/ψ helicity distributions in inelastic photoproduction at HERA

    ZEUS collaboration JHEP12(2009)007

  2. The global minima of the communicative energy of natural communication systems

    Ramon Ferrer i Cancho and Albert Díaz-Guilera J. Stat. Mech. (2007) P06009

  3. On the use of Cimmino's simultaneous projections method for computing a solution of the inverse problem in radiation therapy treatment planning

    Y Censor et al 1988 Inverse Problems 4 607

  4. Analyticity of the susceptibility function for unimodal Markovian maps of the interval

    Yunping Jiang and David Ruelle 2005 Nonlinearity 18 2447

  5. Symmetries of the turbulent state

    Gregory Falkovich 2009 J. Phys. A: Math. Theor. 42 123001

  6. Accurate fields of a radially polarized Gaussian laser beam

    Yousef I Salamin 2006 New J. Phys. 8 133

  7. The TOTEM experiment: total cross-section measurement and soft diffraction at LHC

    K Österberg 2008 J. Phys.: Conf. Ser. 110 022037

  8. Modeling the Office of Science ten year facilities plan: The PERI Architecture Tiger Team

    Bronis R de Supinski et al 2009 J. Phys.: Conf. Ser. 180 012039

  9. The KASCADE-grande experiment

    J Blümer et al 2008 J. Phys.: Conf. Ser. 120 062026

  10. Metal-catalyzed living radical polymerization and radical polyaddition for precision polymer synthesis

    M Mizutani et al 2009 J. Phys.: Conf. Ser. 184 012025

Related review articles

What's this?
View review articles related to this research to gain an insight into the key trends in this subject area. Related review articles are selected based on PACS/MSC codes, and are no more than three years old.

  1. Light scalar mesons in photon–photon collisions
  2. Determining pseudoscalar meson photoproduction amplitudes from complete experiments
  3. Review of high energy diffraction in real and virtual photon–proton scattering at HERA

View by subject




Export






Please login to access our web services, or create an account if you don't yet have one.

You must have cookies enabled in your web browser to be able to login.

Username
Password

Forgotten your password? Get a new one here.