Measurement of forward photon production cross-section in proton–proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>13</mml:mn><mml:mspace width="0.25em"/><mml:mtext>TeV</mml:mtext></mml:math> with the LHCf detector

Adriani, O.; Berti, Eugenio; Bonechi, L.; Bongi, M.; D’Alessandro, R.; Haguenauer, M.; Itow, Y.; Iwata, Tadahisa; Kasahara, K.; Makino, Yuya; Masuda, K.; Matsubayashi, E.; Menjo, H.; Muraki, Y.; Papini, P.; Ricciarini, S.; Sako, Takashi; Sakurai, N.; Shinoda, M.; Suzuki, T.; Tamura, T.; Tiberio, A.; Torii, Shoji; Tricomi, A.; Turner, W. C.; Ueno, M.; Zhou, Q.

doi:10.1016/j.physletb.2017.12.050

Cited by 34 publications

(27 citation statements)

References 29 publications

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“…Distributions are expressed in terms of the inclusive differential production cross section dσ n /dE, which was corrected for the limited coverage of the azimuthal angle. In the comparison with generators, for each model we used its own inelastic cross section, as reported in reference [25].…”

Section: Resultsmentioning

confidence: 99%

“…The second comes from different hardware effects present during data taking at the LHC (2.0%), like ADCs non-linearity, cables attenuation, high voltages stability, PMTs gain calibration. The third is related to the observed shift in the position of the π 0 mass peak with respect to the simulations (+1.6%), as reconstructed from the two gamma invariant mass distribution [25]. Despite the fact that this shift is well within the consistency bounds of the two previously mentioned systematic uncertainties, we decided to consider this contribution as an additional source of error in our analysis.…”

Section: Jhep11(2018)073mentioning

confidence: 93%

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Measurement of inclusive forward neutron production cross section in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV with the LHCf Arm2 detector

Адриани¹,

Berti²,

Bonechi³

et al. 2018

J. High Energ. Phys.

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In this paper, we report the measurement relative to the production of forward neutrons in proton-proton collisions at √ s = 13 TeV obtained using the LHCf Arm2 detector at the Large Hadron Collider. The results for the inclusive differential production cross section are presented as a function of energy in three different pseudorapidity regions: η > 10.76, 8.99 < η < 9.22 and 8.81 < η < 8.99. The analysis was performed using a data set acquired in June 2015 that corresponds to an integrated luminosity of 0.194 nb −1. The measurements were compared with the predictions of several hadronic interaction models used to simulate air showers generated by Ultra High Energy Cosmic Rays. None of these generators showed good agreement with the data for all pseudorapidity intervals. For η > 10.76, no model is able to reproduce the observed peak structure at around 5 TeV and all models underestimate the total production cross section: among them, QGSJET II-04 shows the smallest deficit with respect to data for the whole energy range. For 8.99 < η < 9.22 and 8.81 < η < 8.99, the models having the best overall agreement with data are SIBYLL 2.3 and EPOS-LHC, respectively: in particular, in both regions SIBYLL 2.3 is able to reproduce the observed peak structure at around 1.5-2.5 TeV.

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Section: Resultsmentioning

confidence: 99%

Section: Jhep11(2018)073mentioning

confidence: 93%

Measurement of inclusive forward neutron production cross section in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV with the LHCf Arm2 detector

Адриани¹,

Berti²,

Bonechi³

et al. 2018

J. High Energ. Phys.

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“…Finally, hadron simulations are required to estimate the sensitivity of future gamma-ray observatories, such as the Cherenkov Telescope Array (CTA) [13], the Southern Gamma-ray Survey Observatory (SGSO) [14], and the Large High Altitude Air Shower Observatory (LHAASO) [15] which could be affected by the choice of models. The advent of LHC measurements has provided large amounts of data at never before probed energies [16] and at extreme rapidities [17,18]. This data glut promises improvements to hadronic interaction models by facilitating model tuning in energy ranges not before possible and has resulted in the creation of a new generation of air shower focused hadronic interaction models [19][20][21] tuned to this data set.…”

Section: Introductionmentioning

confidence: 99%

Systematic differences due to high energy hadronic interaction models in air shower simulations in the 100 GeV-100 TeV range

Parsons

Schoorlemmer

2019

Phys. Rev. D

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The predictions of hadronic interaction models for cosmic-ray induced air showers contain inherent uncertainties due to limitations of available accelerator data and theoretical understanding in the required energy and rapidity regime. Differences between models are typically evaluated in the range appropriate for cosmic-ray air shower arrays (10 15 -10 20 eV). However, accurate modelling of charged cosmic-ray measurements with ground based gamma-ray observatories is becoming more and more important.We assess the model predictions on the gross behaviour of measurable air shower parameters in the energy (0.1-100 TeV) and altitude ranges most appropriate for detection by ground-based gammaray observatories. We go on to investigate the particle distributions just after the first interaction point, to examine how differences in the micro-physics of the models may compound into differences in the gross air shower behaviour. Differences between the models above 1 TeV are typically less than 10%. However, we find the largest variation in particle densities at ground at the lowest energy tested (100 GeV), resulting from striking differences in the early stages of shower development.

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“…The data relative to p-p collisions at √ s = 13 TeV was acquired by the LHCf experiment during Fill 3855, a low luminosity and high β * fill. Using this data set, the collaboration published two analyses relative to photons [6] and neutrons [7] production in the forward region.…”

Section: Analysis Resultsmentioning

confidence: 99%

Latest results of the LHCf experiment

Suzuki¹,

Adriani²,

Berti³

et al. 2020

Proceedings of European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2019)

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The LHCf experiment is designed to provide precise measurements of the production spectra relative to neutral particles produced in the very forward region by high energy proton-proton and proton-ion collisions. This information is necessary in order to test and tune hadronic interaction models used by ground-based cosmic rays experiments. In order to reach this goal, LHCf makes use of two small sampling calorimeters installed in the LHC tunnel at ±140 m from IP1, both able to detect neutral particles having pseudo-rapidity η > 8.4. In LHC Run II, LHCf acquired data relative to p-p collisions at √ s = 13 TeV and p-Pb collisions at √ s NN = 8.1 TeV. In this paper, we discuss the results obtained from p-p collisions at √ s = 13 TeV, focusing in particular on photon and neutron production, the two analyses already published by the collaboration.

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Measurement of forward photon production cross-section in proton–proton collisions at s=13TeV with the LHCf detector

Cited by 34 publications

References 29 publications

Measurement of inclusive forward neutron production cross section in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV with the LHCf Arm2 detector

Measurement of inclusive forward neutron production cross section in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV with the LHCf Arm2 detector

Systematic differences due to high energy hadronic interaction models in air shower simulations in the 100 GeV-100 TeV range

Latest results of the LHCf experiment

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