On the use of a running coupling in the calculation of forward hadron production at next-to-leading order

Ducloué, B.; Iancu, E.; Lappi, T.; Mueller, A. H.; Soyez, G.; Triantafyllopoulos, D. N.; Zhu, Y.

doi:10.1016/j.nuclphysa.2018.10.062

Title: On the use of a running coupling in the calculation of forward hadron production at next-to-leading order

Abstract

We study a puzzle raised recently regarding the running coupling prescription used in the calculation of forward particle production in proton-nucleus collisions at next-to-leading order: using a coordinate space prescription which is consis-tent with the one used in the high energy evolution of the target leads to results which can be two orders of magnitude larger than the ones obtained with a momentum space prescription. We show that this is an artefact of the Fourier trans-form involved when passing between coordinate and momentum space and propose a new coordinate space prescription which avoids this problem.

Authors:

Ducloué, B. ^[1]; Iancu, E. ^[1];

^[2]; Mueller, A. H. ^[3];

^[1]; Triantafyllopoulos, D. N. ^[4]; Zhu, Y. ^[5]

Univ. Paris-Saclay, Gif-sur-Yvette (France)
Univ. of Helsinki (Finland)
Columbia Univ., New York, NY (United States)
European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*), Villizzano (Italy)
Technische Univ. Munchen, Garching (Germany)

Publication Date:: Tue Jan 22 00:00:00 EST 2019

Research Org.:: Columbia Univ., New York, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1610194

Grant/Contract Number:: FG02-92ER40699

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Physics. A

Additional Journal Information:: Journal Volume: 982; Journal Issue: C; Journal ID: ISSN 0375-9474

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Physics; Color Glass Condensate; Saturation

Citation Formats


                    Ducloué, B., Iancu, E., Lappi, T., Mueller, A. H., Soyez, G., Triantafyllopoulos, D. N., and Zhu, Y. On the use of a running coupling in the calculation of forward hadron production at next-to-leading order.  United States: N. p., 2019. 
Web.  doi:10.1016/j.nuclphysa.2018.10.062.

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                    Ducloué, B., Iancu, E., Lappi, T., Mueller, A. H., Soyez, G., Triantafyllopoulos, D. N., & Zhu, Y. On the use of a running coupling in the calculation of forward hadron production at next-to-leading order.  United States.  https://doi.org/10.1016/j.nuclphysa.2018.10.062

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                    Ducloué, B., Iancu, E., Lappi, T., Mueller, A. H., Soyez, G., Triantafyllopoulos, D. N., and Zhu, Y. Tue .  
"On the use of a running coupling in the calculation of forward hadron production at next-to-leading order".  United States.  https://doi.org/10.1016/j.nuclphysa.2018.10.062.  https://www.osti.gov/servlets/purl/1610194.

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@article{osti_1610194,

  title        = {On the use of a running coupling in the calculation of forward hadron production at next-to-leading order},

  author       = {Ducloué, B. and Iancu, E. and Lappi, T. and Mueller, A. H. and Soyez, G. and Triantafyllopoulos, D. N. and Zhu, Y.},

  abstractNote = {We study a puzzle raised recently regarding the running coupling prescription used in the calculation of forward particle production in proton-nucleus collisions at next-to-leading order: using a coordinate space prescription which is consis-tent with the one used in the high energy evolution of the target leads to results which can be two orders of magnitude larger than the ones obtained with a momentum space prescription. We show that this is an artefact of the Fourier trans-form involved when passing between coordinate and momentum space and propose a new coordinate space prescription which avoids this problem.},

  doi          = {10.1016/j.nuclphysa.2018.10.062},

  journal      = {Nuclear Physics. A},

  number       = C,

  volume       = 982,

  place        = {United States},

  year         = {Tue Jan 22 00:00:00 EST 2019},

  month        = {Tue Jan 22 00:00:00 EST 2019}

}

Copy to clipboard

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Works referenced in this record:

Operator expansion for high-energy scattering
journal, March 1996

Balitsky, I.
Nuclear Physics B, Vol. 463, Issue 1
DOI: 10.1016/0550-3213(95)00638-9

Small- x $F_{2}$ structure function of a nucleus including multiple Pomeron exchanges
journal, June 1999

Kovchegov, Yuri V.
Physical Review D, Vol. 60, Issue 3
DOI: 10.1103/PhysRevD.60.034008

Direct numerical solution of the coordinate space Balitsky-Kovchegov equation at next-to-leading order
journal, April 2015

Lappi, T.; Mäntysaari, H.
Physical Review D, Vol. 91, Issue 7
DOI: 10.1103/PhysRevD.91.074016

Towards the Test of Saturation Physics Beyond Leading Logarithm
journal, January 2014

Staśto, Anna M.; Xiao, Bo-Wen; Zaslavsky, David
Physical Review Letters, Vol. 112, Issue 1
DOI: 10.1103/PhysRevLett.112.012302

Single inclusive forward hadron production at next-to-leading order
journal, June 2016

Ducloué, B.; Lappi, T.; Zhu, Y.
Physical Review D, Vol. 93, Issue 11
DOI: 10.1103/PhysRevD.93.114016

Deep inelastic scattering in the dipole picture at next-to-leading order
journal, November 2017

Ducloué, B.; Hänninen, H.; Lappi, T.
Physical Review D, Vol. 96, Issue 9
DOI: 10.1103/PhysRevD.96.094017

One-Loop Factorization for Inclusive Hadron Production in $p − A$ Collisions in the Saturation Formalism
journal, March 2012

Chirilli, Giovanni A.; Xiao, Bo-Wen; Yuan, Feng
Physical Review Letters, Vol. 108, Issue 12
DOI: 10.1103/PhysRevLett.108.122301

Use of a running coupling in the NLO calculation of forward hadron production
journal, March 2018

Ducloué, B.; Iancu, E.; Lappi, T.
Physical Review D, Vol. 97, Issue 5
DOI: 10.1103/PhysRevD.97.054020

Computing quark and gluon distribution functions for very large nuclei
journal, March 1994

McLerran, Larry; Venugopalan, Raju
Physical Review D, Vol. 49, Issue 5
DOI: 10.1103/PhysRevD.49.2233

Quark contribution to the small- $x$ evolution of color dipole
journal, January 2007

Balitsky, Ian
Physical Review D, Vol. 75, Issue 1
DOI: 10.1103/physrevd.75.014001

Inclusive hadron productions in $p A$ collisions
journal, September 2012

Chirilli, Giovanni A.; Xiao, Bo-Wen; Yuan, Feng
Physical Review D, Vol. 86, Issue 5
DOI: 10.1103/physrevd.86.054005

Implementation of NLO high energy factorization in single inclusive forward hadron production
journal, June 2017

Ducloué, B.; Lappi, T.; Zhu, Y.
Physical Review D, Vol. 95, Issue 11
DOI: 10.1103/physrevd.95.114007

Single inclusive forward hadron production at next-to-leading order
text, January 2016

Ducloué, B.; Lappi, T.; Zhu, Y.
arXiv
DOI: 10.48550/arxiv.1604.00225

CGC factorization for forward particle production in proton-nucleus collisions at next-to-leading order
text, January 2016

Iancu, E.; Mueller, A. H.; Triantafyllopoulos, D. N.
arXiv
DOI: 10.48550/arxiv.1608.05293

Deep inelastic scattering in the dipole picture at next-to-leading order
text, January 2017

Ducloué, B.; Hänninen, H.; Lappi, T.
arXiv
DOI: 10.48550/arxiv.1708.07328

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Similar Records

Title: On the use of a running coupling in the calculation of forward hadron production at next-to-leading order

Abstract

Citation Formats

Operator expansion for high-energy scattering journal, March 1996

Small- x F 2 structure function of a nucleus including multiple Pomeron exchanges journal, June 1999

Direct numerical solution of the coordinate space Balitsky-Kovchegov equation at next-to-leading order journal, April 2015

Towards the Test of Saturation Physics Beyond Leading Logarithm journal, January 2014

Single inclusive forward hadron production at next-to-leading order journal, June 2016

Deep inelastic scattering in the dipole picture at next-to-leading order journal, November 2017

One-Loop Factorization for Inclusive Hadron Production in p − A Collisions in the Saturation Formalism journal, March 2012

Use of a running coupling in the NLO calculation of forward hadron production journal, March 2018

Computing quark and gluon distribution functions for very large nuclei journal, March 1994

Quark contribution to the small- x evolution of color dipole journal, January 2007

Inclusive hadron productions in p A collisions journal, September 2012

Implementation of NLO high energy factorization in single inclusive forward hadron production journal, June 2017

Single inclusive forward hadron production at next-to-leading order text, January 2016

CGC factorization for forward particle production in proton-nucleus collisions at next-to-leading order text, January 2016

Deep inelastic scattering in the dipole picture at next-to-leading order text, January 2017

Operator expansion for high-energy scattering
journal, March 1996

Small- x $F_{2}$ structure function of a nucleus including multiple Pomeron exchanges
journal, June 1999

Direct numerical solution of the coordinate space Balitsky-Kovchegov equation at next-to-leading order
journal, April 2015

Towards the Test of Saturation Physics Beyond Leading Logarithm
journal, January 2014

Single inclusive forward hadron production at next-to-leading order
journal, June 2016

Deep inelastic scattering in the dipole picture at next-to-leading order
journal, November 2017

One-Loop Factorization for Inclusive Hadron Production in $p − A$ Collisions in the Saturation Formalism
journal, March 2012

Use of a running coupling in the NLO calculation of forward hadron production
journal, March 2018

Computing quark and gluon distribution functions for very large nuclei
journal, March 1994

Quark contribution to the small- $x$ evolution of color dipole
journal, January 2007

Inclusive hadron productions in $p A$ collisions
journal, September 2012

Implementation of NLO high energy factorization in single inclusive forward hadron production
journal, June 2017

Single inclusive forward hadron production at next-to-leading order
text, January 2016

CGC factorization for forward particle production in proton-nucleus collisions at next-to-leading order
text, January 2016

Deep inelastic scattering in the dipole picture at next-to-leading order
text, January 2017