Consistent treatment of charm evolution in deep inelastic scattering
Dec, 1996
17 pages
Published in:
- Eur.Phys.J.C 2 (1998) 287-300
e-Print:
- hep-ph/9612449 [hep-ph]
Report number:
- DTP-96-102,
- RAL-TR-96-103
View in:
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Abstract:
We present a formulation which allows heavy quark (c, b, ...) mass effects to be explicitly incorporated in both the coefficient functions and the splitting functions in the parton evolution equations. We obtain a consistent procedure for evolution through the threshold regions for c anti-c and b anti-b production in deep inelastic scattering, which allows the prediction of the charm and bottom quark densities. We use the new formulation to perform a next-to-leading order global parton analysis of deep inelastic and related hard scattering data. We give predictions for the charm components of the proton structure functions F_2 and F_L as functions of x and Q~2. We examine the Q~2 range of validity of the photon-gluon fusion model for c anti-c electroproduction. We emphasize the value of a precision measurement of the charm component F_2~c at HERA.- electron p: deep inelastic scattering
- p: structure function
- effect: charm
- model: parton
- quark: momentum spectrum
- bottom
- charm
- quark: mass
- quark: pair production
- structure function: longitudinal
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