Intrinsic charm in a matched general-mass scheme

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• 作者：Richard D. Ball^a ; Valerio Bertone^b ; ^c ; Marco Bonvini^c ; Stefano Forte^d ; ^{forte@mi.infn.it" class="auth_mail" title="E-mail the corresponding author} ; Patrick Groth Merrild^a ; Juan Rojo^c ; Luca Rottoli^c
• 刊名：Physics Letters B
• 出版年：2016
• 出版时间：10 March 2016
• 年：2016
• 卷：754
• 期：Complete
• 页码：49-58
• 全文大小：739 K

文摘

The FONLL general-mass variable-flavour number scheme provides a framework for the matching of a calculation in which a heavy quark is treated as a massless parton to one in which the mass dependence is retained throughout. We describe how the usual formulation of FONLL can be extended in such a way that the heavy quark parton distribution functions are freely parameterized at some initial scale, rather than being generated entirely perturbatively. We specifically consider the case of deep-inelastic scattering, in view of applications to PDF determination, and the possible impact of a fitted charm quark distribution on class="mathmlsrc">title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316000046&_mathId=si1.gif&_user=111111111&_pii=S0370269316000046&_rdoc=1&_issn=03702693&md5=02623c34ad6f52f8a6206d23646925b6">class="imgLazyJSB inlineImage" height="16" width="16" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0370269316000046-si1.gif">class="mathContainer hidden">class="mathCode">$F_2^c$ is assessed.