The color-singlet contribution to e^+ e^- ->J/psi + X at the endpoint

Details The color-singlet contribution to e^+ e^- ->J/psi + X at the endpoint The color-singlet contribution to e^+ e^- ->J/psi + X at the endpoint

2007-05-22

arxiv.org/abs/0705.3230v1

Phys.Rev.D76:034005,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 7 figures

Scientific paper

10.1103/PhysRevD.76.034005

Recent observations of the J/psi spectrum produced in e^+e^- collisions at the Upsilon(4S) resonance are in conflict with fixed-order calculations using Non-Relativsitic QCD effective theory (NRQCD). One problem is an enhancement in the cross section when the J/psi has maximal energy, due to large perturbative corrections (Sudakov logarithms). In a recent paper, the Sudakov logarithms in the color-octet contribution were summed by combining NRQCD with the Soft-Collinear Effective Theory. However to be consistent, the color-singlet contributions must also be summed in the endpoint region which was not done in that paper. In this paper, we sum the leading and next-to-leading logarithms in the color-singlet contribution to the J/psi production cross section. We find that the color-singlet cross section is suppressed near endpoint compared to the fixed order NRQCD prediction.

Affiliated with

Also associated with

No associations

Rating

The color-singlet contribution to e^+ e^- ->J/psi + X at the endpoint does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The color-singlet contribution to e^+ e^- ->J/psi + X at the endpoint, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The color-singlet contribution to e^+ e^- ->J/psi + X at the endpoint will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-416405