Measurement of very forward neutron energy spectra for 7 TeV proton–proton collisions at the Large Hadron Collider

Adriani, O.; Berti, Eugenio; Bonechi, L.; Bongi, M.; Castellini, G.; D’Alessandro, R.; Prete, M. Del; Haguenauer, M.; Itow, Y.; Kasahara, K.; Kawade, K.; Makino, Yuya; Masuda, K.; Matsubayashi, E.; Menjo, H.; Mitsuka, G.; Muraki, Y.; Okuno, Yasuki; Papini, P.; Perrot, A. L.; Ricciarini, S.; Sako, T.; Sakurai, N.; Sugiura, Y.; Suzuki, T.; Tamura, T.; Tiberio, A.; Torii, Shoji; Tricomi, A.; Turner, W. C.; Zhou, Q.

doi:10.1016/j.physletb.2015.09.041

Cited by 67 publications

(66 citation statements)

References 22 publications

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“…respectively, have already been published [4][5][6][7]. Latest published results are presented in this paper: neutron energy spectra in p-p collisions at √ s = 7 TeV [8] are shown in Sect. 3.1 while results from π 0 transverse (P T ) and longitudinal (P Z ) momentum analysis in p-p at √ s = 2.76, 7 TeV and p-Pb collisions at √ s NN = 5.02 TeV [9] are shown in Sect.…”

Section: The Detectormentioning

confidence: 92%

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Production spectra of zero-degree neutral particles measured by the LHCf experiment

Tiberio

2017

EPJ Web Conf.

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Abstract. The LHC-forward (LHCf) experiment, situated at the LHC accelerator, has measured neutral particles production in a very forward region (pseudo-rapidity η > 8.4) in proton-proton and proton-lead collisions. The main purpose of the LHCf experiment is to test hadronic interaction models used in ground based cosmic rays experiments to simulate cosmic rays induced air-showers in the Earth's atmosphere. The experiment is composed of two independent detectors located at 140m from the AT-LAS interaction point (IP1) on opposite sides; each detector is composed of two sampling and position sensitive calorimeters. In this paper, latest published physics results from p-p and p-Pb collisions (at √ s = 7, 2.76 TeV and √ s NN = 5.02 TeV, respectively) compared with Monte Carlo predictions of DPMJET, EPOS, PYTHIA, QGSJET and SIBYLL event generators will be presented. In particular, the inclusive energy spectra of neutrons in p-p collisions and the transverse and longitudinal momentum spectra of neutral pions for different pseudo-rapidity ranges in p-p and p-Pb collisions will be shown; then, test of Feynman scaling hypothesis using neutral pion spectra will be discussed. Preliminary results of photon inclusive energy spectra in p-p collisions at √ s = 13 TeV will be also presented.

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Section: The Detectormentioning

confidence: 92%

“…In this section results from neutron analysis in p-p collisions at √ s = 7 TeV are presented [8]. [10].…”

Section: Neutron Energy Spectra In P-p Collisionsmentioning

confidence: 99%

Production spectra of zero-degree neutral particles measured by the LHCf experiment

Tiberio

2017

EPJ Web Conf.

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“…LHCf group also published the neutron energy spectra in pp collisions at √ s =7 TeV [24]. DP-MJET 3.04 described the LHCf data well at the lower η range (9.22 > η > 8.81).…”

Section: Information From Lhcf Experimentsmentioning

confidence: 97%

Air Shower Development and Hadron Production at Very Forward Region

Sakurai

2018

Proceedings of 2016 International Conference on Ultra-High Energy Cosmic Rays (UHECR2016)

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Whereas muon in extensive air shower is an observable sensitive to the primary composition and to the hadron interaction properties, the discrepancy between measured and estimated values has not been solved. Using the new data of forward hadron from an accelerator experiment, a hadron interaction model (QGSJET II-04) is modified. Air shower simulation with the modified interaction model produces more muons. The increased muons concentrate around the shower core and the number density of secondary particle far from core does not change much.

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“…Production cross sections of neutrons were also published using the 7 TeV proton-proton collision data [16]. The result covering 0 degree production angle showed a characteristic peak at around 2.5 TeV, and such high-energy excess was only qualitatively explained by the QGSJET II-03 model.…”

Section: Pos(eps-hep2017)025mentioning

confidence: 99%

Latest results of the LHCf experiment at LHC

Tricomi¹

2017

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2017)

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In 2016 the LHCf experiment has fulfilled its original goal of measuring the spectra of the neutral particles produced in the very forward direction at LHC at the highest energy ever available. The main purpose of these measurements is indeed to provide the Cosmic Ray and High Energy Physics communities with a missing unique set of information for the improvement of the hadronic interaction models used to simulate air showers development produced in the interaction of primary High Energy Cosmic Rays (HECR) with the Earth atmosphere. The last data sets collected by the LHCf experiment have been obtained during p+p collisions, at an energy of 13 TeV in the CM frame, and p+Pb collision, at an energy of the colliding nucleon pair of 5.2 TeV and 8.1 TeV in the CM frame. A review of the main results of LHCf and of the recent and on-going activities are presented.

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Measurement of very forward neutron energy spectra for 7 TeV proton–proton collisions at the Large Hadron Collider

Cited by 67 publications

References 22 publications

Production spectra of zero-degree neutral particles measured by the LHCf experiment

Production spectra of zero-degree neutral particles measured by the LHCf experiment

Air Shower Development and Hadron Production at Very Forward Region

Latest results of the LHCf experiment at LHC

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