Determining color-octet ψ-production matrix elements from γp and ep processes

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We calculate, within the NRQCD factorization formalism, the leading color-octet contributions to ψ production in photon-nucleon and electron-nucleon collisions. The expressions we obtaine depend on the NRQCD matrix elements 〈O 8 ψ( 1S 0)〉 and (O 8 ψ( 3P 0)〉. These matrix elements can be determined by fitting to experimental data. The color-octet contribution to ψ photoproduction is in the forward region of phase space, where there may be large corrections to the NRQCD result from higher twist terms. As to ψ leptoproduction we point out that the theoretical uncertainties plaguing the photoproduction calculation vanish in the large momentum transfer limit. In this region of phase space the NRQCD formalism should be valid, making ψ leptoproduction an ideal laboratory for testing the theory.

Original languageEnglish (US)
Pages (from-to)3995-4004
Number of pages10
JournalInternational Journal of Modern Physics A
Volume12
Issue number22
StatePublished - Sep 10 1997
Externally publishedYes

Fingerprint

octets
photoproduction
Phase Space
formalism
color
matrices
factorization
Twist
momentum transfer
Vanish
Factorization
Photon
Collision
Momentum
Experimental Data
Electron
Valid
Uncertainty
Calculate
Testing

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Mathematical Physics
  • Nuclear and High Energy Physics

Cite this

Determining color-octet ψ-production matrix elements from γp and ep processes. / Fleming, Sean P.

In: International Journal of Modern Physics A, Vol. 12, No. 22, 10.09.1997, p. 3995-4004.

Research output: Contribution to journalArticle

@article{10d1226875d7478bb4bce2afedca5afc,
title = "Determining color-octet ψ-production matrix elements from γp and ep processes",
abstract = "We calculate, within the NRQCD factorization formalism, the leading color-octet contributions to ψ production in photon-nucleon and electron-nucleon collisions. The expressions we obtaine depend on the NRQCD matrix elements 〈O 8 ψ( 1S 0)〉 and (O 8 ψ( 3P 0)〉. These matrix elements can be determined by fitting to experimental data. The color-octet contribution to ψ photoproduction is in the forward region of phase space, where there may be large corrections to the NRQCD result from higher twist terms. As to ψ leptoproduction we point out that the theoretical uncertainties plaguing the photoproduction calculation vanish in the large momentum transfer limit. In this region of phase space the NRQCD formalism should be valid, making ψ leptoproduction an ideal laboratory for testing the theory.",
author = "Fleming, {Sean P}",
year = "1997",
month = "9",
day = "10",
language = "English (US)",
volume = "12",
pages = "3995--4004",
journal = "International Journal of Modern Physics A",
issn = "0217-751X",
publisher = "World Scientific Publishing Co. Pte Ltd",
number = "22",

}

TY - JOUR

T1 - Determining color-octet ψ-production matrix elements from γp and ep processes

AU - Fleming, Sean P

PY - 1997/9/10

Y1 - 1997/9/10

N2 - We calculate, within the NRQCD factorization formalism, the leading color-octet contributions to ψ production in photon-nucleon and electron-nucleon collisions. The expressions we obtaine depend on the NRQCD matrix elements 〈O 8 ψ( 1S 0)〉 and (O 8 ψ( 3P 0)〉. These matrix elements can be determined by fitting to experimental data. The color-octet contribution to ψ photoproduction is in the forward region of phase space, where there may be large corrections to the NRQCD result from higher twist terms. As to ψ leptoproduction we point out that the theoretical uncertainties plaguing the photoproduction calculation vanish in the large momentum transfer limit. In this region of phase space the NRQCD formalism should be valid, making ψ leptoproduction an ideal laboratory for testing the theory.

AB - We calculate, within the NRQCD factorization formalism, the leading color-octet contributions to ψ production in photon-nucleon and electron-nucleon collisions. The expressions we obtaine depend on the NRQCD matrix elements 〈O 8 ψ( 1S 0)〉 and (O 8 ψ( 3P 0)〉. These matrix elements can be determined by fitting to experimental data. The color-octet contribution to ψ photoproduction is in the forward region of phase space, where there may be large corrections to the NRQCD result from higher twist terms. As to ψ leptoproduction we point out that the theoretical uncertainties plaguing the photoproduction calculation vanish in the large momentum transfer limit. In this region of phase space the NRQCD formalism should be valid, making ψ leptoproduction an ideal laboratory for testing the theory.

UR - http://www.scopus.com/inward/record.url?scp=0242656507&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0242656507&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0242656507

VL - 12

SP - 3995

EP - 4004

JO - International Journal of Modern Physics A

JF - International Journal of Modern Physics A

SN - 0217-751X

IS - 22

ER -