NDLI: Transverse momentum broadening and the jet quenching parameter , redux

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Transverse momentum broadening and the jet quenching parameter , redux

Content Provider	Semantic Scholar
Author	Eramo, Francesco D’ Liu Rajagopal, Krishna
Copyright Year	2011
Abstract	Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We use soft collinear effective theory (SCET) to analyze the transverse momentum broadening, or diffusion in transverse momentum space, of an energetic parton propagating through quark-gluon plasma. Since we neglect the radiation of gluons from the energetic parton, we can only discuss momentum broadening, not parton energy loss. The interaction responsible for momentum broadening in the absence of radiation is that between the energetic (collinear) parton and the Glauber modes of the gluon fields in the medium. We derive the effective Lagrangian for this interaction, and we show that the probability for picking up transverse momentum k ? is given by the Fourier transform of the expectation value of two transversely separated lightlike path-ordered Wilson lines. This yields a field-theoretical definition of the jet-quenching parameter ^ q, and shows that this can be interpreted as a diffusion constant. We close by revisiting the calculation of ^ q for the strongly coupled plasma of N ¼ 4 SYM theory, showing that previous calculations need some modifications that make them more straightforward and do not change the result.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://dspace.mit.edu/openaccess-disseminate/1721.1/68662
Alternate Webpage(s)	https://link.aps.org/accepted/10.1103/PhysRevD.84.065015
Language	English
Access Restriction	Open
Subject Keyword	Fatigue Glauber Html Link Type - copyright Order (action) Plasma Active Population Parameter Position and momentum space Redux Sarcoma Terms of service Theoretical definition Transverse wave benefit
Content Type	Text
Resource Type	Article

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