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Equivalent photons at the LHC: 𝑝𝑝(𝛾𝛾)→𝑝𝑝ℓ+ℓ−, Pb Pb (𝛾𝛾)→ Pb Pb ℓ+ℓ−
EPJ Web of Conferences. 2018. Vol. 191. P. 02015-1-02015-7.
Vysotsky M., Zhemchugov E.
The Large Hadron Collider is considered as a photon-photon collider
with the photons produced in ultraperipheral collisions of protons or heavy ions.
The equivalent photon approximation is applied to derive analytical formulae
for the fiducial cross sections of reactions pp(γγ) pp μ+μ− and Pb Pb (γγ)→ →
Pb Pb μ+μ−. The results are compared to the measurements reported by the
ATLAS collaboration.
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2023 Vol. 108 No. 1 Article 12007
A search for the rare hadronic decay B0s→p¯p is performed using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb−1. No evidence of the decay is found and an upper limit on its branching fraction is set at B(B0s→p¯p)<4.4(5.1)×10−9 at 90% (95%) confidence level; this is currently the ...
Added: September 1, 2023
Ratnikov F., Viktoria Chekalina, Journal of Physics: Conference Series 2018 Vol. 1085 P. 1-5
Reconstruction and identification of particles in calorimeters of modern High Energy Physics experiments is a complicated task. Solutions are usually driven by a priori knowledge about expected properties of reconstructed objects. Such an approach is also used to distinguish single photons in the electromagnetic calorimeter of the LHCb detector at the LHC from overlapping photons ...
Added: October 18, 2018
Aaij R., Beteta C. A., Ustyuzhanin A. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2020 No. 102 P. 071101
The Ξc0 baryon is unstable and usually decays into charmless final states by the c→sud¯ transition. It can, however, also disintegrate into a π- meson and a Λc+ baryon via s quark decay or via cs→dc weak scattering. The interplay between the latter two processes governs the size of the branching fraction B(Ξc0→π-Λc+), first measured ...
Added: December 2, 2020
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Journal of High Energy Physics 2023 Vol. 2023 No. 7 Article 63
A search for direct CP violation in the Cabibbo-suppressed decay 𝐷+𝑠 → K−K+K+ and in the doubly Cabibbo-suppressed decay D+ → K−K+K+ is reported. The analysis is performed with data collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 5.6 fb−1. The search is conducted by comparing the 𝐷+(𝑠) and 𝐷−(𝑠) Dalitz-plot distributions through a model-independent ...
Added: September 26, 2023
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review Letters 2023 Vol. 131 No. 4 Article 041804
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.131.041804 ...
Added: December 4, 2023
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Journal of High Energy Physics 2023 Vol. 119 Article 119
The first observation of the Bs0 → D∗+D∗− decay and the measurement of its branching ratio relative to the B0 → D∗+D∗− decay are presented. The data sample used corresponds to an integrated luminosity of 9fb−1 of proton-proton collisions recorded by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV between 2011 ...
Added: November 19, 2023
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review Letters 2023 Vol. 131 No. 5 Article 051803
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.131.051803 ...
Added: December 4, 2023
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review Letters 2023 Vol. 131 No. 7 Article 071901
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.131.071901 ...
Added: December 4, 2023
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2023 Vol. 108 No. 5 Article 052005
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.108.052005 ...
Added: December 4, 2023
Сапронов А. А., Aad G., Glazov A., Physical Review D - Particles, Fields, Gravitation and Cosmology 2017 Vol. 96 No. 7 P. 072002-1-072002-36
Jet energy scale measurements and their systematic uncertainties are reported for jets measured with the ATLAS detector using proton-proton collision data with a center-of-mass energy of s=13 TeV, corresponding to an integrated luminosity of 3.2 fb-1 collected during 2015 at the LHC. Jets are reconstructed from energy deposits forming topological clusters of calorimeter cells, using the anti-kt ...
Added: August 7, 2018
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2023 Vol. 108 No. 1 Article 012008
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.108.012008 ...
Added: December 4, 2023
Aaboud M., Glazov A., et a. et al., The European Physical Journal C - Particles and Fields 2016 Vol. 76 No. 12 P. 1-42
he algorithms used by the ATLAS Collaboration to reconstruct and identify prompt photons are described. Measurements of the photon identification efficiencies are reported, using 4.9 fb−1 of pp collision data collected at the LHC at s√=7 TeV and 20.3 fb−1 at s√=8 TeV . The efficiencies are measured separately for converted and unconverted photons, in ...
Added: August 7, 2018
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., The European Physical Journal C - Particles and Fields 2023 Vol. 83 Article 543
https://link.springer.com/article/10.1140/epjc/s10052-023-11673-x#Abs1 ...
Added: December 4, 2023
Aaij R., Beteta C. A., A. Boldyrev et al., Journal of High Energy Physics 2020 Vol. 11 No. 095 P. 1-20
A search for the doubly heavy {\Xi}_{bc}^0Ξbc0 baryon using its decay to the D^{0}0pK^{–}– final state is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb experiment between 2016 and 2018, corresponding to an integrated luminosity of 5.4 fb^{−1}−1. No significant signal is found in the invariant mass range from 6.7 ...
Added: December 2, 2020
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Journal of High Energy Physics 2023 Vol. 2023 No. 08 Article 93
https://link.springer.com/article/10.1007/JHEP08(2023)093#Abs1 ...
Added: November 30, 2023
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Chinese Physics C 2023 Vol. 47 No. 9 Article 093001
https://iopscience.iop.org/article/10.1088/1674-1137/ace9c8#artAbst ...
Added: December 4, 2023
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review Letters 2023 Vol. 131 No. 9 Article 091901
Searches for the rare hadronic decays B0→p¯pp¯p and B0s→p¯pp¯p are performed using proton-proton collision data recorded by the LHCb experiment and corresponding to an integrated luminosity of 9 fb−1. Significances of 9.3σ and 4.0σ, including statistical and systematic uncertainties, are obtained for the B0→p¯pp¯p and B0s→p¯pp¯p signals, respectively. The branching fractions are measured relative to the ...
Added: September 11, 2023
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Journal of High Energy Physics 2023 No. 6 Article 22
https://link.springer.com/article/10.1007/JHEP06(2023)022#Abs1 ...
Added: December 4, 2023
Vysotsky M., Жемчугов Е. В., Успехи физических наук 2019 Т. 189 № 9 С. 975-984
С помощью метода эквивалентных фотонов вычислено экспериментально наблюдаемые сечения рождения мюонной пары в ультрапериферийных столкновениях протон-протон и свинец-свинец. Получены аналитические формулы, учитывающие экспериментальные обрезания. Результаты расчётов сравниваются с результатами измерений, выполненными коллаборацией ATLAS. ...
Added: November 1, 2018
Aaij R., Beteta C. A., Boldyrev A. et al., Physical Review Letters 2021 Vol. 126 No. 12 P. 1-11
Using pppp collision data corresponding to an integrated luminosity of 5.4fb−15.4fb−1 collected with the LHCb detector at a center-of-mass energy of 13TeV13TeV, the B0→D−D+K+π−B0→D−D+K+π− decay is studied. A new excited D+sDs+ meson is observed decaying into the D+K+π−D+K+π− final state with large statistical significance. The pole mass and width, and the spin-parity of the new state are measured with an amplitude analysis to be mR=2591±6±7MeVmR=2591±6±7MeV, ΓR=89±16±12MeVΓR=89±16±12MeV and JP=0−JP=0−, where the ...
Added: August 31, 2021
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2023 Vol. 108 No. 5 Article 052008
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.108.052008 ...
Added: November 29, 2023
Сапронов А. А., Aaboud M., Glazov A., Physical Review Letters 2016 Vol. 117 No. 18 P. 1-19
his Letter presents a measurement of the inelastic proton-proton cross section using 60 μb-1 of pp collisions at a center-of-mass energy s of 13 TeV with the ATLAS detector at the LHC. Inelastic interactions are selected using rings of plastic scintillators in the forward region (2.07<|η|<3.86) of the detector. A cross section of 68.1±1.4 mb is measured in ...
Added: August 7, 2018
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2023 Vol. 131 No. 10 Article 102301
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.131.102301 ...
Added: December 4, 2023
Сапронов А. А., Aad G., Glazov A., Physics Letters B 2016 Vol. 759 P. 601-621
Measurements of the W±→ℓ±ν and Z→ℓ+ℓ− production cross sections (where ℓ±=e±,μ± ) in proton–proton collisions at s=13 TeV are presented using data recorded by the ATLAS experiment at the Large Hadron Collider, corresponding to a total integrated luminosity of 81 pb −1 . The total inclusive W± -boson production cross sections times the single-lepton-flavour branching ratios ...
Added: August 7, 2018