Photos — a universal Monte Carlo for QED radiative corrections in decays

Barberio, E.; Eijk, B. Van; Wa̧s, Z.

doi:10.1016/0010-4655(91)90012-a

Cited by 413 publications

(350 citation statements)

References 13 publications

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“…Events containing X(3872) or ψ(2S) states are generated using pythia [15], and decayed using evtgen [16], with the signal resonances forced to decay into the J/ψπ + π − final state. Photon final-state radiation (FSR) is implemented using photos [17,18]. The X(3872) and ψ(2S) resonances are assumed to be unpolarized.…”

Section: Jhep04(2013)154mentioning

confidence: 99%

Measurement of the X(3872) production cross section via decays to J/ψπ + π − in pp collisions at $ \sqrt{s}=7 $ TeV

Chatrchyan

Khachatryan

Sirunyan

et al. 2013

J. High Energ. Phys.

119

131

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Measurement of the X(3872) production cross section via decays to J/ψπ + π − in pp collisions at √ s = 7 TeVThe CMS collaboration E-mail: cms-publication-committee-chair@cern.chAbstract: The production of the X(3872) is studied in pp collisions at √ s = 7 TeV, using decays to J/ψπ + π − , where the J/ψ decays to two muons. The data were recorded by the CMS experiment and correspond to an integrated luminosity of 4.8 fb −1 . The measurements are performed in a kinematic range in which the X(3872) candidates have a transverse momentum 10 < p T < 50 GeV and rapidity |y| < 1.2. The ratio of the X(3872) and ψ(2S) cross sections times their branching fractions into J/ψπ + π − is measured as a function of p T . In addition, the fraction of X(3872) originating from B decays is determined. From these measurements the prompt X(3872) differential cross section times branching fraction as a function of p T is extracted. The π + π − mass spectrum of the J/ψπ + π − system in the X(3872) decays is also investigated.

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Section: Jhep04(2013)154mentioning

confidence: 99%

Measurement of the X(3872) production cross section via decays to J/ψπ + π − in pp collisions at $ \sqrt{s}=7 $ TeV

Chatrchyan

Khachatryan

Sirunyan

et al. 2013

J. High Energ. Phys.

119

131

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show abstract

“…Simulated events with b-hadron decays are also generated with pythia, and the b hadrons are forced to decay inclusively into J/ψ and ψ(2S) using the EvtGen package. Photon final-state radiation (FSR) is implemented using photos [18,19].…”

Section: Data Selection and Event Reconstructionmentioning

confidence: 99%

J/ψ and ψ(2S) production in pp collisions at $ \sqrt {s} = 7{\text{Tev}} $

Chatrchyan¹,

Khachatryan²,

Sirunyan³

et al. 2012

J. High Energ. Phys.

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A measurement of the J/ψ and ψ(2S) production cross sections in pp collisions at $ \sqrt {s} = 7{\text{TeV}} $ with the CMS experiment at the LHC is presented. The data sample corresponds to an integrated luminosity of 37 pb−1. Using a fit to the invariant mass and decay length distributions, production cross sections have been measured separately for prompt and non-prompt charmonium states, as a function of the meson transverse momentum in several rapidity ranges and integrated in the kinematical regions considered in this study. In addition, cross sections restricted to the acceptance of the CMS detector are given, which are not affected by the polarization of the charmonium states. The ratio of the differential production cross sections of the two states, where systematic uncertainties largely cancel, is also determined. The branching fraction of the inclusive B → ψ(2S)X decay is extracted from the ratio of the non-prompt cross sections to be: $ \mathcal{B}\left( {{\text{B}} \to \psi \left( {\text{2S}} \right)X} \right) = \left( {{3}.0{8}\pm 0.{12}\left( {{\text{stat}}. + {\text{syst}}.} \right)\pm 0.{13}\left( {{\text{theor}}.} \right)\pm 0.{42}\left( {{\mathcal{B}_{\text{PDG}}}} \right)} \right) \times {1}{0^{{ - {3}}}}. $

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“…The simulation of hadronic final states, including K + K − π + π − γ, K + K − π 0 π 0 γ and K + K − K + K − γ, is based on the approach suggested by Czyż and Kühn [20]. Multiple soft-photon emission from the initialstate charged particles is implemented with a structurefunction technique [21,22], and photon radiation from the final-state particles is simulated by the PHOTOS package [23]. The precision of the radiative corrections is about 1% [21,22].…”

Section: The Babar Detector and Datasetmentioning

confidence: 99%

Cross sections for the reactionse+e−→K+K−π+
Lees¹,
Poireau²,
Prencipe³
et al. 2012
Phys. Rev. D
78
3
41
0
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, where the photon is radiated from the initial state. About 84000, 8000, and 4200 fully-reconstructed events, respectively, are selected from 454 fb −1 of BABAR data. The invariant mass of the hadronic final state defines the e + e − center-of-mass energy, so that the K + K − π + π − γ data can be compared with direct measurements of the e + e − → K + K − π + π − reaction. No direct measurements exist for the e + e − → K + K − π 0 π 0 or e + e − → K + K − K + K − reactions, and we present an update of our previous result based on a data sample that is twice as large. Studying the structure of these events, we find contributions from a number of intermediate states, and extract their cross sections. In particular, we perform a more detailed study of the e + e − → φ(1020)ππγ reaction, and confirm the presence of the Y (2175) resonance in the φ(1020)f0(980) and K + K − f0(980) modes. In the charmonium region, we observe the J/ψ in all three final states and in several intermediate states, as well as the ψ(2S) in some modes, and measure the corresponding products of branching fraction and electron width.

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Photos — a universal Monte Carlo for QED radiative corrections in decays

Cited by 413 publications

References 13 publications

Measurement of the X(3872) production cross section via decays to J/ψπ + π − in pp collisions at $ \sqrt{s}=7 $ TeV

Measurement of the X(3872) production cross section via decays to J/ψπ + π − in pp collisions at $ \sqrt{s}=7 $ TeV

J/ψ and ψ(2S) production in pp collisions at $ \sqrt {s} = 7{\text{Tev}} $

Cross sections for the reactionse+e−→K+K−π+
Lees¹,
Poireau²,
Prencipe³
et al. 2012
Phys. Rev. D
78
3
41
0
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Photos — a universal Monte Carlo for QED radiative corrections in decays

Cited by 413 publications

References 13 publications

Measurement of the X(3872) production cross section via decays to J/ψπ + π − in pp collisions at $ \sqrt{s}=7 $ TeV

Measurement of the X(3872) production cross section via decays to J/ψπ + π − in pp collisions at $ \sqrt{s}=7 $ TeV

J/ψ and ψ(2S) production in pp collisions at $ \sqrt {s} = 7{\text{Tev}} $

Cross sections for the reactionse+e−→K+K−π+Lees1, Poireau2, Prencipe3 et al. 2012Phys. Rev. D783410View full textAdd to dashboardCite

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Cross sections for the reactionse+e−→K+K−π+
Lees¹,
Poireau²,
Prencipe³
et al. 2012
Phys. Rev. D
78
3
41
0
View full text Add to dashboard Cite