We study the region of small transverse momenta in q&qmacr;- and gg-initiated processes with no colored particle detected in the final state. We present the universal expression of the O(alpha(2)(s)) logarithmically enhanced contributions up to next-to-next-to-leading-order logarithmic accuracy. From there we extract the coefficients that allow the resummation of the large logarithmic contributions. We find that the coefficient known in the literature as B((2)) is process dependent, since it receives a hard contamination from the one-loop correction to the leading-order subprocess. We present the general result of B((2)) for both quark and gluon channels.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.85.4678 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Rapidity distribution at soft-virtual and beyond for -colorless particles to LO in QCD.
Eur Phys J C Part Fields
October 2021
The Institute of Mathematical Sciences, HBNI, IV Cross Road, Taramani, Chennai, 600113 India.
We present a systematic framework to study the threshold contributions of the differential rapidity distribution for the production of any number of colorless particles in the hadronic colliders. This has been achieved based on the universality structure of the soft enhancements associated with the real emissions, along with the factorization property of the differential cross section and the renormalization group invariance. In this formalism, we present a universal soft-collinear operator to compute the soft virtual differential cross section for a generic scattering process up to next-to-next-to-next-to-next-to-leading order ( LO) in perturbative QCD.
View Article and Find Full Text PDFPrecision QCD Event Shapes at Hadron Colliders: The Transverse Energy-Energy Correlator in the Back-to-Back Limit.
Phys Rev Lett
August 2019
Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, Hangzhou, 310027, China.
We present an operator-based factorization formula for the transverse energy-energy correlator (TEEC) hadron collider event shape in the back-to-back (dijet) limit. This factorization formula exhibits a remarkably symmetric form, being a projection onto a scattering plane of a more standard transverse momentum dependent factorization. Soft radiation is incorporated through a dijet soft function, which can be elegantly obtained to next-to-next-to-leading order (NNLO) due to the symmetries of the problem.
View Article and Find Full Text PDFNext-to-Next-to-Next-to-Leading Order Pressure of Cold Quark Matter: Leading Logarithm.
Phys Rev Lett
November 2018
Helsinki Institute of Physics and Department of Physics, FI-00014 University of Helsinki, Finland.
At high baryon chemical potential μ_{B}, the equation of state of QCD allows a weak-coupling expansion in the QCD coupling α_{s}. The result is currently known up to and including the full next-to-next-to-leading order α_{s}^{2}. Starting at this order, the computations are complicated by the modification of particle propagation in a dense medium, which necessitates nonperturbative treatment of the scale α_{s}^{1/2}μ_{B}.
View Article and Find Full Text PDFThree-Loop Quark Jet Function.
Phys Rev Lett
August 2018
PRISMA Cluster of Excellence, Institute of Physics, Johannes Gutenberg University, 55128 Mainz, Germany.
We calculate the massless quark jet function to three-loop order. The quark jet function is a universal ingredient in SCET factorization for many collider and decay processes with quark initiated final state jets. Our three-loop result contributes to the resummation for observables probing the invariant mass of final state quark jets at primed next-to-next-to-next-to-leading-logarithmic accuracy.
View Article and Find Full Text PDFMeasurement of differential cross sections for boson production in association with jets in proton-proton collisions at .
Eur Phys J C Part Fields
November 2018
Université Libre de Bruxelles, Bruxelles, Belgium.
The production of a boson, decaying to two charged leptons, in association with jets in proton-proton collisions at a centre-of-mass energy of 13 is measured. Data recorded with the CMS detector at the LHC are used that correspond to an integrated luminosity of 2.19 .
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!