Results 1 to 10 of about 397,179 (177)

Direct photon production and PDF fits reloaded [PDF]

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
Direct photon production in hadronic collisions provides a handle on the gluon PDF by means of the QCD Compton scattering process. In this work we revisit the impact of direct photon production on a global PDF analysis, motivated by the recent ...
John M. Campbell   +3 more
doaj   +2 more sources

Jet Production in Photon-Photon Interactions [PDF]

open access: yes, 1996
The inclusive one- and two-jet cross-sections are measured in collisions of quasi-real photons at e+e- centre-of-mass energies of 130 and 136 GeV using the OPAL detector at LEP. Jets are reconstructed with a cone jet finding algorithm.
Soldner-Rembold, Stefan
core   +3 more sources

Chargino Production and Decay in Photon-Photon-Collisions [PDF]

open access: yesNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2000
We study the production and leptonic decay of charginos in collisions of polarized photon beams including the complete spin correlations. The photons can be generated by Compton backscattering of polarized laser pulses off a polarized electron beam ...
Bartl   +10 more
core   +5 more sources

Chargino Production and Decay in Photon-Photon-Collisions [PDF]

open access: yesThe European Physical Journal C, 2002
We discuss the pair production of charginos in collisions of polarized photons $\gamma\gamma \to \tilde{\chi}_i^+ \tilde{\chi}_i^-$, ($i=1,2$) and the subsequent leptonic decay of the lighter chargino $\tilde{\chi}_1^+ \to \tilde{\chi}_1^0 e^+ \nu_e ...
Bloechinger, C.   +3 more
core   +7 more sources

Multi-crystal native-SAD phasing at 5 keV with a helium environment

open access: yesIUCrJ, 2022
De novo structure determination from single-wavelength anomalous diffraction using native sulfur or phosphorus in biomolecules (native-SAD) is an appealing method to mitigate the labor-intensive production of heavy-atom derivatives and selenomethionyl ...
Akira Karasawa   +6 more
doaj   +1 more source

Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector

open access: yesJournal of High Energy Physics, 2021
A measurement of prompt photon-pair production in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb −1.
The ATLAS collaboration   +2890 more
doaj   +1 more source

Charmonium Production in Photon-Photon Collisions [PDF]

open access: yesPhysical Review Letters, 1988
We have searched for the two-photon production of the /eta//sub c/, /chi//sub 0/ and /chi//sub 2/ charmonium states at the e/sup +/e/sup -/ collider PEP in the channels /gamma//gamma/ /yields/ K/sup +-/K/sub S//sup 0//pi//sup -+/, /gamma//gamma/ /yields/ K/sup +/K/sup -//pi//sup +//pi//sup -/, /gamma//gamma/ /yields/ /pi//sup +//pi//sup -//pi//sup ...
H. Aihara   +84 more
openaire   +3 more sources

Inclusive D∗± production in photon-photon collisions [PDF]

open access: yesPhysics Letters B, 1990
Abstract The TPC/Two-Gamma Collaboration has measured the inclusive cross section for production of charmed D∗± mesons in photon-photon collisions. The reaction utilized was e+e-→e+e-D∗±X, with D∗±→DOπ+-, DO→K-+π ±, and either zero or one outgoing e± detected. The result, σ(e + e - → e + e - D ∗± X) = 74±26±19 pb ,
M. Alston-Garnjost   +73 more
openaire   +3 more sources

NLO QCD corrections to exclusive quarkonium-pair production in photon–photon collision

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
We calculate the next-to-leading order (NLO) quantum chromodynamics (QCD) corrections to the exclusive processes $$\gamma +\gamma \rightarrow {\mathcal {Q}}+{\mathcal {Q}}$$ γ+γ→Q+Q , with $${\mathcal {Q}}=J/\psi ,\ \eta _c,\ \Upsilon $$ Q=J/ψ,ηc,Υ , or $
Hao Yang, Zi-Qiang Chen, Cong-Feng Qiao
doaj   +1 more source

Photon fragmentation in the antenna subtraction formalism

open access: yesJournal of High Energy Physics, 2022
The theoretical description of photon production at particle colliders combines direct photon radiation and fragmentation processes, which can not be separated from each other for definitions of photon isolation used in experimental measurements.
Thomas Gehrmann, Robin Schürmann
doaj   +1 more source

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