Towards a new global QCD analysis: Low x DIS data from non-linear evolution

E. Gotsman; E. Levin; M. Lublinsky; U. Maor

doi:10.1140/epjc/s2002-01109-y

Towards a new global QCD analysis: Low x DIS data from non-linear evolution

E. Gotsman, E. Levin, M. Lublinsky, U. Maor

Research output: Contribution to journal › Article › peer-review

86 Scopus citations

Abstract

A new approach to global QCD analysis is developed. The main ingredients are two QCD-based evolution equations. The first one is the Balitsky-Kovchegov non-linear equation, which sums higher twists while preserving unitarity. The second equation is linear and it is responsible for the correct short distance behavior of the theory, namely it includes the DGLAP kernel. Our approach allows for extrapolation of the parton distributions to the very high energies available at the LHC as well as very low photon virtualities, Q² ≪ 1GeV². All existing low χ data on the F₂ structure function are reproduced using two fitting parameters, the other parameters were taken as constants. The result is χ²/df = 1. Analyzing the parameter λ ≡ ∂ln F₂/∂(ln 1/χ) at very low x and Q² well below 1 GeV² we find λ ≅ 0.08-0.1. This is a result which agrees with the "soft pomeron" intercept without involving soft physics.

Original language	English
Pages (from-to)	411-425
Number of pages	15
Journal	European Physical Journal C
Volume	27
Issue number	3
DOIs	https://doi.org/10.1140/epjc/s2002-01109-y
State	Published - 1 Apr 2003
Externally published	Yes

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

Access to Document

10.1140/epjc/s2002-01109-y

Cite this

@article{b1704f22487d4d3cbecb1a1b4149c49b,

title = "Towards a new global QCD analysis: Low x DIS data from non-linear evolution",

abstract = "A new approach to global QCD analysis is developed. The main ingredients are two QCD-based evolution equations. The first one is the Balitsky-Kovchegov non-linear equation, which sums higher twists while preserving unitarity. The second equation is linear and it is responsible for the correct short distance behavior of the theory, namely it includes the DGLAP kernel. Our approach allows for extrapolation of the parton distributions to the very high energies available at the LHC as well as very low photon virtualities, Q2 ≪ 1GeV2. All existing low χ data on the F2 structure function are reproduced using two fitting parameters, the other parameters were taken as constants. The result is χ2/df = 1. Analyzing the parameter λ ≡ ∂ln F2/∂(ln 1/χ) at very low x and Q2 well below 1 GeV2 we find λ ≅ 0.08-0.1. This is a result which agrees with the {"}soft pomeron{"} intercept without involving soft physics.",

author = "E. Gotsman and E. Levin and M. Lublinsky and U. Maor",

year = "2003",

month = apr,

day = "1",

doi = "10.1140/epjc/s2002-01109-y",

language = "English",

volume = "27",

pages = "411--425",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "3",

}

TY - JOUR

T1 - Towards a new global QCD analysis

T2 - Low x DIS data from non-linear evolution

AU - Gotsman, E.

AU - Levin, E.

AU - Lublinsky, M.

AU - Maor, U.

PY - 2003/4/1

Y1 - 2003/4/1

N2 - A new approach to global QCD analysis is developed. The main ingredients are two QCD-based evolution equations. The first one is the Balitsky-Kovchegov non-linear equation, which sums higher twists while preserving unitarity. The second equation is linear and it is responsible for the correct short distance behavior of the theory, namely it includes the DGLAP kernel. Our approach allows for extrapolation of the parton distributions to the very high energies available at the LHC as well as very low photon virtualities, Q2 ≪ 1GeV2. All existing low χ data on the F2 structure function are reproduced using two fitting parameters, the other parameters were taken as constants. The result is χ2/df = 1. Analyzing the parameter λ ≡ ∂ln F2/∂(ln 1/χ) at very low x and Q2 well below 1 GeV2 we find λ ≅ 0.08-0.1. This is a result which agrees with the "soft pomeron" intercept without involving soft physics.

AB - A new approach to global QCD analysis is developed. The main ingredients are two QCD-based evolution equations. The first one is the Balitsky-Kovchegov non-linear equation, which sums higher twists while preserving unitarity. The second equation is linear and it is responsible for the correct short distance behavior of the theory, namely it includes the DGLAP kernel. Our approach allows for extrapolation of the parton distributions to the very high energies available at the LHC as well as very low photon virtualities, Q2 ≪ 1GeV2. All existing low χ data on the F2 structure function are reproduced using two fitting parameters, the other parameters were taken as constants. The result is χ2/df = 1. Analyzing the parameter λ ≡ ∂ln F2/∂(ln 1/χ) at very low x and Q2 well below 1 GeV2 we find λ ≅ 0.08-0.1. This is a result which agrees with the "soft pomeron" intercept without involving soft physics.

UR - http://www.scopus.com/inward/record.url?scp=0037398628&partnerID=8YFLogxK

U2 - 10.1140/epjc/s2002-01109-y

DO - 10.1140/epjc/s2002-01109-y

M3 - Article

AN - SCOPUS:0037398628

SN - 1434-6044

VL - 27

SP - 411

EP - 425

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

ER -

Towards a new global QCD analysis: Low x DIS data from non-linear evolution

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this