Abstract
The angular distribution in photon-jet production in p (p) over bar -> gamma jet X is studied within a generalized factorization scheme taking into account the transverse momentum of the partons in the initial hadrons. Within this scheme an anomalously large cos2 phi asymmetry observed in the Drell-Yan process could be attributed to the T-odd, spin and transverse momentum dependent parton distribution function h(1)(perpendicular to q) (x, p(perpendicular to)(2)). This same function is expected to produce a cos 2 phi asymmetry in the photon-jet production cross section. We give the expression for this particular azimuthal asymmetry, which is estimated to be smaller than the Drell-Yan asymmetry but still of considerable size for Tevatron kinematics. This offers a new possibility to study T-odd effects at the Tevatron.
| Original language | English |
|---|---|
| Pages (from-to) | 360-368 |
| Number of pages | 9 |
| Journal | Physics Letters B |
| Volume | 660 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 28-Feb-2008 |
| Externally published | Yes |
Keywords
- DRELL-YAN PROCESS
- LEPTON PAIR PRODUCTION
- ANGULAR-DISTRIBUTIONS
- PARTON DISTRIBUTIONS
- HADRONIC COLLISIONS
- SPIN ASYMMETRIES
- NEGATIVE PIONS
- SCATTERING
- LEPTOPRODUCTION
- FACTORIZATION