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Systematics of quarkonium production at the LHC and double parton fragmentation

Fleming, Sean and Leibovich, Adam K. and Mehen, Thomas and Rothstein, Ira Z. (2012) Systematics of quarkonium production at the LHC and double parton fragmentation. Physical Review D, 86 (9). Art. No. 094012. ISSN 1550-7998. https://resolver.caltech.edu/CaltechAUTHORS:20130114-102047070

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Abstract

In this paper, we discuss the systematics of quarkonium production at the LHC. In particular, we focus on the necessity to sum logs of the form log(Q/p⊥) and log(p⊥/m_Q). We show that the former contributions are power suppressed, while the latter, whose contribution in fragmentation is well known, also arise in the short distance (i.e., nonfragmentation) production mechanisms. Though these contributions are suppressed by powers of m_Q/p⊥, they can be enhanced by inverse powers of v, the relative velocity between heavy quarks in the quarkonium. In the limit p⊥≫m_Q, short-distance production can be thought of as the fragmentation of a pair of partons (i.e., the heavy quark and antiquark) into the final state quarkonium. We derive an all-order factorization theorem for this process in terms of double parton fragmentation functions and calculate the one-loop anomalous dimension matrix for the double parton fragmentation functions.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.86.094012DOIArticle
http://link.aps.org/doi/10.1103/PhysRevD.86.094012PublisherArticle
ORCID:
AuthorORCID
Rothstein, Ira Z.0000-0002-3374-4212
Additional Information:© 2012 American Physical Society. Received 15 August 2012; published 6 November 2012. We thank Iain Stewart and Wouter Waalewijn for useful conversations. S. F. was supported in part by the Director, Office of Science, Office of Nuclear Physics, of the U.S. Department of Energy under Grants No. DE-FG02- 06ER41449 and No. DE-FG02-04ER41338. S. F. also acknowledges support from the DFG cluster of excellence "Origin and structure of the universe." A. K. L. was supported in part by the National Science Foundation under Grant No. PHY-0854782. T.M. was supported in part by the Director, Office of Science, Office of Nuclear Physics, of the U.S. Department of Energy under Grant No. DEFG02- 05ER41368. I. Z.R. is supported by DOE Grants No. DE-FG02-04ER41338 and No. FG02-06ER41449. I. Z. R. also acknowledges support from the Gordon and Betty Moore Foundation and thanks the Caltech Theory Group for its hospitality.
Group:Moore Center for Theoretical Cosmology and Physics
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-06ER41449
Department of Energy (DOE)DE-FG02-04ER41338
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
NSFPHY-0854782
Gordon and Betty Moore FoundationUNSPECIFIED
Department of Energy (DOE)DE-FG02-05ER41368
Issue or Number:9
Classification Code:PACS: 13.87.Fh
Record Number:CaltechAUTHORS:20130114-102047070
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130114-102047070
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36349
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:14 Jan 2013 21:35
Last Modified:03 Oct 2019 04:37

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