J/psi Polarization in pp Collisions at root s=7 TeV


Abelev B., Quintana A. A., Adamova D., Adare A. M., Aggarwal M. M., Rinella G. A., ...Daha Fazla

PHYSICAL REVIEW LETTERS, cilt.108, sa.8, 2012 (SCI-Expanded) identifier identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 108 Sayı: 8
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1103/physrevlett.108.082001
  • Dergi Adı: PHYSICAL REVIEW LETTERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Bursa Uludağ Üniversitesi Adresli: Hayır

Özet

The ALICE Collaboration has studied J/psi production in pp collisions at root s = 7 TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/psi polarization parameters lambda(theta) and lambda(phi) were obtained. The study was performed in the kinematic region 2: 5 < y < 4, 2 < p(t) < 8 GeV/c, in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties.