What have we learned about and from F(L)(x, Q**2) at HERA? - INSPIRE

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What have we learned about and from F(L)(x, Q**2) at HERA?

Robert S. Thorne
(
- Rutherford
)

Aug, 1997

17 pages

Published in:

Phys.Lett.B 418 (1998) 371-382

e-Print:

hep-ph/9708302 [hep-ph]

DOI:

10.1016/S0370-2693(97)01406-8

Report number:

RAL-TR-97-039

View in:

ADS Abstract Service

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Abstract:

Recently the H1 collaboration has published a ``determination'' of the structure function F_L(x,Q^2) at low x. I address the question of how reliable this determination really is. I argue that it is in fact a consistency check of a given theoretical approach rather than a real determination of the value of F_L(x,Q^2), but potentially a very useful one. I compare the consistency of different approaches, and indeed find that a LO--in--\alpha_s calculation of structure functions is completely ruled out. I also find that the ``determined'' values of F_L(x,Q^2) are surprisingly stable under changes in theoretical approach but, when working consistently within a well-defined theoretical framework, the values of F_L(x,Q^2) implied are somewhat lower than previously quoted.

Note:

Tex file, including modification of Harvmac, 17 pages plus 5 figures in .ps files Report-no: RAL-TR-088

electron p: deep inelastic scattering
structure function: longitudinal
small-x
statistical analysis
interpretation of experiments: DESY HERA Stor

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Figures(0)

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