2012/09/26 by Alexander Mitov, George Sterman
Physics and Astronomy · #Cross section (physics) #Hadron #High-Energy Particle Collisions Research #Lambda #Momentum (technical analysis) #Momentum transfer #Nuclear physics #Particle (ecology) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Radiation #Scattering #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.86.114038
18 pages, 6 figures
arxiv created 2012/09/26 · openalex publication_date 2012/12/26 · arxiv updated 2013/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the role of low momentum transfer (soft) interactions between high transverse momentum heavy particles and beam remnants (spectators) in hadronic collisions. Such final state interactions are power suppressed for single-particle inclusive cross sections whenever that particle is accompanied by a recoiling high-pT partner whose momentum is not fixed. An example is the single-top inclusive cross section in top-pair production. Final state soft interactions in multiparticle inclusive cross sections, including transverse momentum distributions, however, produce leading-power corrections in the absence of hard recoiling radiation. Nonperturbative corrections due to scattering from spectators are generically suppressed by powers of \ensuremathΛ/pT^\ensuremath', where \ensuremathΛ is a hadronic scale and pT^\ensuremath' is the largest transverse momentum of radiation recoiling against the particles whose momenta are observed.