2013/09/27 by Marta Łuszczak, Marta Luszczak, Antoni Szczurek +2 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.1309.7201
20 pages, 17 figures, 1 table, typos corrected, references and a discussion added
openalex publication_date 2013/09/27 · arxiv created 2013/10/03 · arxiv updated 2013/10/04 · openalex created_date 2022/10/06 · openalex updated_date 2026/07/28
We discuss many new subleading processes for inclusive production of W+ W- pairs not included in the literature so far. We focus on photon-photon induced processes. We include elastic-elastic, elastic-inelastic, inelastic-elastic and inelastic-inelastic contributions. The inelastic photon distributions in the proton are calculated in two different ways: naive approach used already in the literature and using photon distributions by solving special evolution equation with photon being a parton in the proton. The results strongly depend on the approach used. We calculate also contributions with resolved photons. The diffractive components have similar characteristics as the photon-photon elastic-inelastic and inelastic-elastic mechanisms. The subleading contributions are compared with the well known q q and g g as well as with double-parton scattering contributions. Predictions for the total cross section and differential distributions in W- boson rapidity and transverse momentum as well as WW invariant mass are presented. The γγ components constitute only about 1-2 % of the inclusive W+ W- cross section but about 10 % at large W± transverse momenta, and are even comparable to the dominant q q component at large MWW, i.e. are much larger than the often celebrated g g → W+ W- component. Its size is comparable to double parton scattering contribution. Only elastic-elastic, elastic-inelastic and inelastic-elastic contributions could be potentially measured to verify our predictions using forward proton detectors.