Resonant production of color octet electron at the LHeC
نویسندگان
چکیده
منابع مشابه
Color - Octet ψ ′ Production at Low p ⊥
We study contributions from color-octet quarkonium formation mechanisms to p ⊥-integrated ψ ′ production cross sections in pion-nucleon reactions. The observed polarization of the ψ ′ is not reproduced by the lowest-order leading-twist color-singlet and color-octet mechanisms. This suggests that there are important quarkonium production mechanisms beyond leading twist.
متن کاملColor - Octet $ ’ Production at Low pl
We study contributions from color-octet quarkonium formation mechanisms to pl-integrated $' production cross sections in pion-nucleon reactions. The observed polarization of the +' is not reproduced by the lowest-order leading-twist color-singlet and color-octet mechanisms. This suggests that there are important quarkonium production mechanisms beyond leading twist.
متن کاملColor-octet quarkonia production.
Gluon fragmentation represents the dominant source of high energy prompt quarkonia at hadron colliders. Fragmentation approximations break down, however, when a quarkonium’s transverse momentum becomes comparable to its mass. In this paper, we identify a large class of color-octet diagrams that mediate quarkonia production at all energies and reduce to the dominant set of gluon fragmentation gr...
متن کاملColor-octet quarkonia production. II.
We calculate the lowest order hadronic cross sections for producing colored heavy quark-antiquark pairs in L = S = 0 and L = S = 1 configurations. Such QQ[S (8) 0 ] and QQ[P (8) J ] states hadronize into ψQ quarkonia at the same order in the NRQCD velocity expansion as previously considered QQ[S (8) 1 ] pairs. Their contributions to prompt Psi and Upsilon production at the Tevatron bring the sh...
متن کاملSignatures of Color-octet Quarkonium Production A
I briefly review the nonrelativistic QCD picture of quarkonium production and its confrontation with experiment in various production processes.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2010
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2010.04.070