Experimental Status of the Longitudinal Structure Function, F[sub L]

2011 ◽  
Author(s):  
M. Eric Christy
Keyword(s):  
Structure Function ◽  
Longitudinal Structure ◽  
Experimental Status ◽  
Longitudinal Structure Function

A new calculation of the order-g4 QCD corrections to the longitudinal structure function

1984 ◽  
Vol 138 (5-6) ◽  
pp. 418-420 ◽  
Author(s):  
A. Devoto ◽  
D.W. Duke ◽  
J.D. Kimel ◽  
G.A. Sowell
Keyword(s):  
Structure Function ◽  
Longitudinal Structure ◽  
Longitudinal Structure Function

scholarly journals Calculating Energy Spectra from Drifters

2016 ◽  
Author(s):  
Joseph H. LaCasce
Keyword(s):  
Energy Spectrum ◽  
Kinetic Energy ◽  
Structure Function ◽  
Two Dimensions ◽  
Longitudinal Structure ◽  
Kinetic Energy Spectrum ◽  
Longitudinal Structure Function ◽  
Large Pair ◽  
Non Local ◽  
Lagrangian Data

The relations between the kinetic energy spectrum and the second order longitudinal structure function in two dimensions are derived, and several examples are considered. The forward conversion (from spectrum to structure function) is illustrated first with idealized power law spectra, representing turbulent inertial ranges. The forward conversion is also applied to the zonal kinetic energy spectrum of Nastrom and Gage (1985) and the result agrees well with the longitudinal structure function of Lindborg (1999). The inverse conversion (from structure function to spectrum) is tested with data from 2D turbulence simulations. When applied to the theoretical structure function (derived from the forward conversion of the spectrum), the result closely resembles the original spectrum, except at the largest wavenumbers. However the inverse conversion is much less successful when applied to the structure function obtained from pairs of particles in the flow. This is because the inverse conversion favors large pair separations, which are typically noisy with particle data. Fitting the structure function to a polynomial improves the result, but not sufficiently to distinguish the correct inertial range dependencies. Furthermore the inversion of non-local spectra is largely unsuccessful. Thus it appears that focusing on structure functions with Lagrangian data is preferable to estimating spectra.

scholarly journals HARD-POMERON BEHAVIOR OF THE LONGITUDINAL STRUCTURE FUNCTION FL IN THE NEXT-TO-LEADING ORDER AT LOW x

2009 ◽  
Vol 18 (01) ◽  
pp. 131-140 ◽  
Author(s):  
G. R. BOROUN
Keyword(s):  
Perturbation Theory ◽  
Structure Function ◽  
Perturbative Qcd ◽  
Gluon Distribution ◽  
Analytic Formula ◽  
Leading Order ◽  
Longitudinal Structure ◽  
Longitudinal Structure Function ◽  
Low X

We present an analytic formula to extract the longitudinal structure function in the next-to-leading order of the perturbation theory at low x, from the Regge-like behavior of the gluon distribution and the structure function at this limit. In this approach, the longitudinal structure function has the hard-Pomeron behavior. The determined values are compared with the H1 data and MRST model. All results can consistently be described within the framework of perturbative QCD, which essentially show increases as x decreases.

scholarly journals Measurement of the diffractive longitudinal structure function $F_{L}^{D}$ at HERA

2011 ◽  
Vol 71 (12) ◽  
Author(s):  
F. D. Aaron ◽  
◽  
C. Alexa ◽  
V. Andreev ◽  
S. Backovic ◽  
...  
Keyword(s):  
Structure Function ◽  
Longitudinal Structure ◽  
Longitudinal Structure Function

scholarly journals Nuclear longitudinal structure function in eA processes at the LHeC

2017 ◽  
Vol 32 (33) ◽  
pp. 1750197 ◽  
Author(s):  
G. R. Boroun ◽  
B. Rezaei ◽  
S. Heidari
Keyword(s):  
Structure Function ◽  
Heavy Quark ◽  
Distribution Ratio ◽  
Gluon Distribution ◽  
Quark Mass ◽  
Mass Effect ◽  
Longitudinal Structure ◽  
Heavy Quark Mass ◽  
Longitudinal Structure Function ◽  
Geometrical Scaling

The nucleon and nuclear longitudinal structure functions are determined by the Kharzeev–Levin–Nardin (KLN) model of the low-[Formula: see text] gluon distribution. The behavior of the gluon distribution ratio [Formula: see text] and the ratio [Formula: see text] in [Formula: see text] processes are shown in this paper. The heavy longitudinal structure function ratios in [Formula: see text] processes at the LHeC region are discussed. Heavy contributions to the ratio of the total longitudinal structure function are considerable and should not be neglected especially at smaller [Formula: see text] of the LHeC project. In the KLN model, the new geometrical scaling for transition from the linear to nonlinear regions in accordance with the LHeC processes is used, whose results intensively depended on the heavy quark mass effect.

QCD predictions for the longitudinal structure function at HERA up to O(αs2)

1991 ◽  
Vol 270 (1) ◽  
pp. 61-64 ◽  
Author(s):  
S. Keller ◽  
M. Miramontes ◽  
G. Parente ◽  
J. Sánchez Guillén ◽  
O.A. Sampayo
Keyword(s):  
Structure Function ◽  
Longitudinal Structure ◽  
Longitudinal Structure Function
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