Handling of the generation of primary events in Gauss, the LHCb simulation framework

Belyaev, I.; Brambach, T.; Brook, N. H.; Gauvin, N.; Corti, G.; Harrison, K.; Harrison, P. F.; He, J.; Jones, C. R.; Lieng, M.; Manca, G.; Miglioranzi, S.; Robbe, P.; Vagnoni, V.; Whitehead, M.; Wishahi, J.

doi:10.1088/1742-6596/331/3/032047

Cited by 494 publications

(318 citation statements)

References 21 publications

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“…Alternatively, Powheg [28,29] whereby a NLO QCD (O(α S )) calculation can be interfaced to a parton shower model such as Pythia which can approximate higher order effects. Comparisons with these models, and with the LHCb version [9] of Pythia [8] are shown in figure 5(b). The Resbos and Powheg distributions are normalised to their own cross-section predictions, while the Pythia distribution is normalised to the cross-section measured in data.…”

Section: Resultsmentioning

confidence: 99%

“…Simulated samples of Z → τ + τ − and of tt are used to assess possible background contributions. For the simulation, pp collisions are generated using Pythia 6.4 [8] with a specific LHCb configuration [9] and the CTEQ6L1 PDF set [10]. The interaction of the generated particles with the detector and its response are implemented using the Geant4 toolkit [11,12] as described in ref.…”

Section: Event Selectionmentioning

confidence: 99%

See 1 more Smart Citation

Measurement of the cross-section for Z → e+e- production in pp collisions at $\sqrt{s}=7$ TeV

Aaij¹,

Beteta²,

Adametz³

et al. 2013

J. High Energ. Phys.

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A measurement of the cross-section for pp → Z → e + e − is presented using data at √ s = 7 TeV corresponding to an integrated luminosity of 0.94 fb −1 . The process is measured within the kinematic acceptance p T > 20 GeV/c and 2 < η < 4.5 for the daughter electrons and dielectron invariant mass in the range 60-120 GeV/c 2 . The cross-section is determined to be σ(pp → Z → e + e − ) = 76.0 ± 0.8 ± 2.0 ± 2.6 pb where the first uncertainty is statistical, the second is systematic and the third is the uncertainty in the luminosity. The measurement is performed as a function of Z rapidity and as a function of an angular variable which is closely related to the Z transverse momentum. The results are compared with previous LHCb measurements and with theoretical predictions from QCD.

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Section: Resultsmentioning

confidence: 99%

Section: Event Selectionmentioning

confidence: 99%

Measurement of the cross-section for Z → e+e- production in pp collisions at $\sqrt{s}=7$ TeV

Aaij¹,

Beteta²,

Adametz³

et al. 2013

J. High Energ. Phys.

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show abstract

“…LHCb MC simulations are described in ref. [6], with pp collisions generated by Pythia 6 [7]. Emerging particles decay via EvtGen [8], with final state radiation handled by Photos [9].…”

Section: Jhep08(2011)034mentioning

confidence: 99%

Measurement of V 0 production ratios in pp collisions at $ \sqrt {s} = 0.9 $ and 7 TeV

Aaij

Adeva

Adinolfi

et al. 2011

J. High Energ. Phys.

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Measurement of V 0 production ratios in pp collisions at √ s = 0.9 and 7 TeVThe LHCb collaboration Abstract: The Λ/Λ and Λ/K 0 S production ratios are measured by the LHCb detector from 0.3 nb −1 of pp collisions delivered by the LHC at √ s = 0.9 TeV and 1.8 nb −1 at √ s = 7 TeV. Both ratios are presented as a function of transverse momentum, p T , and rapidity, y, in the ranges 0.15 < p T < 2.50 GeV/c and 2.0 < y < 4.5. Results at the two energies are in good agreement as a function of rapidity loss, ∆y = y beam − y, and are consistent with previous measurements. The ratio Λ/Λ, measuring the transport of baryon number from the collision into the detector, is smaller in data than predicted in simulation, particularly at high rapidity. The ratio Λ/K 0 S , measuring the baryon-to-meson suppression in strange quark hadronisation, is significantly larger than expected.

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“…In the simulation, pp collisions are generated using PYTHIA [21] with a specific LHCb configuration [22]. Decays of hadronic particles are described by EVTGEN [23], in which final-state radiation is generated using PHOTOS [24].…”

Section: Fig 1 Scs Classes Of Diagrams Contributing To the Decaysmentioning

confidence: 99%

Studies of the resonance structure inD0→KS0K±π∓decays

Aaij¹,

Adeva²,

Adinolfi³

et al. 2016

Phys. Rev. D

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Amplitude models are applied to studies of resonance structure in D 0 → K 0 S K − π þ and D 0 → K 0 S K þ π − decays using pp collision data corresponding to an integrated luminosity of 3.0 fb −1 collected by the LHCb experiment. Relative magnitude and phase information is determined, and coherence factors and related observables are computed for both the whole phase space and a restricted region of 100 MeV=c 2 around the K Ã ð892Þ AE resonance. Two formulations for the Kπ S-wave are used, both of which give a good description of the data. The ratio of branching fractionsis measured to be 0.655 AE 0.004ðstatÞ AE 0.006ðsystÞ over the full phase space and 0.370 AE 0.003ðstatÞ AE 0.012ðsystÞ in the restricted region. A search for CP violation is performed using the amplitude models and no significant effect is found. Predictions from SU(3) flavor symmetry for K Ã ð892ÞK amplitudes of different charges are compared with the amplitude model results.

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Handling of the generation of primary events in Gauss, the LHCb simulation framework

Cited by 494 publications

References 21 publications

Measurement of the cross-section for Z → e+e- production in pp collisions at $\sqrt{s}=7$ TeV

Measurement of the cross-section for Z → e+e- production in pp collisions at $\sqrt{s}=7$ TeV

Measurement of V 0 production ratios in pp collisions at $ \sqrt {s} = 0.9 $ and 7 TeV

Studies of the resonance structure inD0→KS0K±π∓decays

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