$Υ$ decay to two-charm quark jets as a Probe of the Color Octet Mechanism

Details $Υ$ decay to two-charm quark jets as a Probe of the Color Octet Mechanism $Υ$ decay to two-charm quark jets as a Probe of the Color Octet Mechanism

2008-08-21

arxiv.org/abs/0808.2985v2

Phys.Rev.D78:094017,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

Accepted for publication in Phys. Rev. D, Appendices added

Scientific paper

10.1103/PhysRevD.78.094017

We calculate the decay rate of bottomonium to two-charm quark jets $\Upsilon \to c \bar c$ at the tree level and one-loop level including color-singlet and color-octet $b \bar b$ annihilations. We find that the short distance coefficient of the color-octet piece is much larger than the color-singlet piece, and that the QCD correction will change the endpoint behavior of the charm quark jet. The color-singlet piece is strongly affected by the one-loop QCD correction. In contrast, the QCD correction to the color-octet piece is weak. Once the experiment can measure the branching ratio and energy distribution of the two-charm quark jets in the $\Upsilon$ decay, the result can be used to test the color octet mechanism or give a strong constraint on the color-octet matrix elements.

Affiliated with

Also associated with

No associations

Rating

$Υ$ decay to two-charm quark jets as a Probe of the Color Octet Mechanism 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 $Υ$ decay to two-charm quark jets as a Probe of the Color Octet Mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and $Υ$ decay to two-charm quark jets as a Probe of the Color Octet Mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-220317