Using 1-jettiness to measure 2 jets in DIS 3 ways
Author(s)
Kang, Daekyoung; Lee, Christopher; Stewart, Iain
DownloadKang-2013-Using 1-jettiness.pdf (1.257Mb)
PUBLISHER_POLICY
Publisher Policy
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.
Terms of use
Metadata
Show full item recordAbstract
We predict cross sections in deep inelastic scattering (DIS) for the production of two jets—one along the proton beam direction created by initial-state radiation (ISR) and another created by final-state radiation after the hard collision. Our results include fixed-order corrections and a summation of large logarithms up to next-to-next-to-leading logarithmic accuracy in resummed perturbation theory. We make predictions for three versions of a DIS event shape 1-jettiness, each of which constrains hadronic final states to be well collimated into two jets along the beam and final-state jet directions, but which differ in their sensitivity to the transverse momentum of the ISR from the proton beam. We use the tools of soft collinear effective theory to derive factorization theorems for these three versions of 1-jettiness. The sensitivity to the ISR gives rise to significantly different structures in the corresponding factorization theorems—for example, dependence on either the ordinary or the generalized k[subscript ⊥]-dependent beam function. Despite the differences among 1-jettiness definitions, we show that the leading nonperturbative correction that shifts the tail region of their distributions is given by a single universal nonperturbative parameter Ω[subscript 1], even accounting for hadron mass effects. Finally, we give numerical results for Q[superscript 2] and x values explored at the HERA collider, emphasizing that the target of our factorization-based analyses is to open the door for higher-precision jet phenomenology in DIS.
Date issued
2013-09Department
Massachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of PhysicsJournal
Physical Review D
Publisher
American Physical Society
Citation
Kang, Daekyoung, Christopher Lee, and Iain W. Stewart. “Using 1-jettiness to measure 2 jets in DIS 3 ways.” Physical Review D 88, no. 5 (September 2013). © 2013 American Physical Society
Version: Final published version
ISSN
1550-7998
1550-2368