Lifetimes, cross sections, and production mechanisms of charmed particles produced by 20-GeV photons

K, Abe; Armenteros, R.; Tc, Bacon; Ballam, J.; Hh, Bingham; Je, Brau; Braune, K.; Brick, D.; Wm, Bugg; Butler, J. M.; Cameron, W.; Ho, Cohn; Dc, Colley; Gt, Condo; Dingus, P.; Erickson, R.; Rc, Field; Franek, B.; Gearhart, R.; Glanzman, T.; Im, Godfrey; Jj, Goldberg; Hall, G.; Hancock, Edwin R.; Hj, Hargis; El, Hart; Mj, Harwin; Hasegawa, K.; Jobes, M.; Kafka, T.; Ge, Kalmus; Kelsey, D. P.; Kitagaki, T.; Wa, Mann; Merenyi, R.; Milburn, R. H.; Kc, Moffeit; Jj, Murray; Napier, A.; Vr, O'Dell; Rankin, P.; Sagawa, H.; Schneps, J.; Sj, Sewell; Shank, J. T.; Am, Shapiro; Shimony, J.; Tamai, K.; Tanaka, S.; Da, Waide; Widgoff, M.; Wolbers, S.; Ca, Woods; Yamaguchi, A.; Gp, Yost; Yuta, H.

doi:10.1103/physrevd.33.1

Cited by 30 publications

(15 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A large antiparticle/particle asymmetry, not explainable in terms of pQCD models, has been reported in the literature and numerical estimations of associative charm photoproduction cross sections have been done in Refs. [2,4,6]. The values are reported as open symbols in Fig.…”

Section: E Contribution To D/d Asymmetriesmentioning

confidence: 99%

“…Therefore we normalize the total cross section for γ +p → Λ + c +D 0 , which is the largest from all the exclusive reactions γ +p → Y c +D, to the measured cross section of open charm photoproduction at E γ = 20 GeV [6], where it was found that about 70 % of the total cross section can be attributed to γ + p → Λ + c + D 0 . This condition constrains very strongly the parameters for all the three versions of the model, where this reaction has the largest cross section.…”

Section: Three Possible Scenariosmentioning

confidence: 99%

“…The data correspond to the total charm photoproduction cross section from [1] (reverse triangle), [2] (square), [3] (asterisk), [4] (star), [5] (triangles), [6] (circle), following coupling constants:…”

Section: Three Possible Scenariosmentioning

confidence: 99%

“…Since then, several experiments were devoted to this subject, [3,4,5], but, up to now, the smallest energy where data are available is E γ =20 GeV, [6], which is still relatively far from threshold (for example, E thr = 8.7 GeV for γ + p → Λ + c + D 0 ). Charm particle photoproduction is usually interpreted according to the photon-gluon fusion mechanism (PGF), γ+G → c+c [7], which can be considered as the simplest QCD hard process (called leading order (LO) approximation).…”

Section: Introductionmentioning

confidence: 99%

“…For example, at E γ = 20 GeV, the associative Λ c D-production contribute 71% to the total cross section of open charm photoproduction [6].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Polarization phenomena in open charm photoproduction processes

Tomasi–Gustafsson

Rekalo

2004

Phys. Rev. D

View full text Add to dashboard Cite

We analyze polarization effects in associative photoproduction of pseudoscalar (D) charmed mesons in exclusive processes γ + N → Yc + D, Yc = Λ + c , Σc. Circularly polarized photons induce nonzero polarization of the Yc-hyperon with x-and z-components (in the reaction plane) and non vanishing asymmetries Ax and Az for polarized nucleon target. These polarization observables can be predicted in model-independent way for exclusive D-production processes in collinear kinematics. The T-even Yc-polarization and asymmetries for non-collinear kinematics can be calculated in framework of an effective Lagrangian approach. The depolarization coefficients D ab , characterizing the dependence of the Yc-polarization on the nucleon polarization are also calculated.

show abstract

Section: E Contribution To D/d Asymmetriesmentioning

confidence: 99%

Section: Three Possible Scenariosmentioning

confidence: 99%