Measurement of zero degree single photon energy spectra for √s=7 TeV proton-proton collisions at LHC

O. Adriani, L. Bonechi, M. Bongi, G. Castellini, R. D'Alessandro, A. Faus, K. Fukatsu, M. Haguenauer, Y. Itow, K. Kasahara, K. Kawade, D. Macina, T. Mase, K. Masuda, Y. Matsubara, H. Menjo, G. Mitsuka, Y. Muraki, M. Nakai, K. NodaP. Papini, A. L. Perrot, S. Ricciarini, T. Sako, Y. Shimizu, K. Suzuki, T. Suzuki, K. Taki, T. Tamura, S. Torii, A. Tricomi, W. C. Turner, J. Velasco, A. Viciani, Kenji Yoshida

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

In early 2010, the Large Hadron Collider forward (LHCf) experiment measured very forward neutral particle spectra in LHC proton-proton collisions. From a limited data set taken under the best beam conditions (low beam-gas background and low occurrence of pile-up events), the single photon spectra at √s=7 TeV and pseudo-rapidity (Η) ranges from 8.81 to 8.99 and from 10.94 to infinity were obtained for the first time and are reported in this Letter. The spectra from two independent LHCf detectors are consistent with one another and serve as a cross check of the data. The photon spectra are also compared with the predictions of several hadron interaction models that are used extensively for modeling ultra-high energy cosmic-ray showers. Despite conservative estimates for the systematic errors, none of the models agree perfectly with the measurements. A notable difference is found between the data and the DPMJET 3.04 and PYTHIA 8.145 hadron interaction models above 2 TeV where the models predict higher photon yield than the data. The QGSJET II-03 model predicts overall lower photon yield than the data, especially above 2 TeV in the rapidity range 8.81<η<8.99.

Original languageEnglish
Pages (from-to)128-134
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume703
Issue number2
DOIs
Publication statusPublished - 2011 Sep 7

Fingerprint

energy spectra
collisions
protons
photons
neutral particles
cosmic ray showers
piles
systematic errors
infinity
interactions
occurrences
detectors
estimates
predictions
gases
energy

Keywords

  • Hadron interaction models
  • LHC
  • Ultra-high energy cosmic-ray

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Measurement of zero degree single photon energy spectra for √s=7 TeV proton-proton collisions at LHC. / Adriani, O.; Bonechi, L.; Bongi, M.; Castellini, G.; D'Alessandro, R.; Faus, A.; Fukatsu, K.; Haguenauer, M.; Itow, Y.; Kasahara, K.; Kawade, K.; Macina, D.; Mase, T.; Masuda, K.; Matsubara, Y.; Menjo, H.; Mitsuka, G.; Muraki, Y.; Nakai, M.; Noda, K.; Papini, P.; Perrot, A. L.; Ricciarini, S.; Sako, T.; Shimizu, Y.; Suzuki, K.; Suzuki, T.; Taki, K.; Tamura, T.; Torii, S.; Tricomi, A.; Turner, W. C.; Velasco, J.; Viciani, A.; Yoshida, Kenji.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 703, No. 2, 07.09.2011, p. 128-134.

Research output: Contribution to journalArticle

Adriani, O, Bonechi, L, Bongi, M, Castellini, G, D'Alessandro, R, Faus, A, Fukatsu, K, Haguenauer, M, Itow, Y, Kasahara, K, Kawade, K, Macina, D, Mase, T, Masuda, K, Matsubara, Y, Menjo, H, Mitsuka, G, Muraki, Y, Nakai, M, Noda, K, Papini, P, Perrot, AL, Ricciarini, S, Sako, T, Shimizu, Y, Suzuki, K, Suzuki, T, Taki, K, Tamura, T, Torii, S, Tricomi, A, Turner, WC, Velasco, J, Viciani, A & Yoshida, K 2011, 'Measurement of zero degree single photon energy spectra for √s=7 TeV proton-proton collisions at LHC', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 703, no. 2, pp. 128-134. https://doi.org/10.1016/j.physletb.2011.07.077
Adriani, O. ; Bonechi, L. ; Bongi, M. ; Castellini, G. ; D'Alessandro, R. ; Faus, A. ; Fukatsu, K. ; Haguenauer, M. ; Itow, Y. ; Kasahara, K. ; Kawade, K. ; Macina, D. ; Mase, T. ; Masuda, K. ; Matsubara, Y. ; Menjo, H. ; Mitsuka, G. ; Muraki, Y. ; Nakai, M. ; Noda, K. ; Papini, P. ; Perrot, A. L. ; Ricciarini, S. ; Sako, T. ; Shimizu, Y. ; Suzuki, K. ; Suzuki, T. ; Taki, K. ; Tamura, T. ; Torii, S. ; Tricomi, A. ; Turner, W. C. ; Velasco, J. ; Viciani, A. ; Yoshida, Kenji. / Measurement of zero degree single photon energy spectra for √s=7 TeV proton-proton collisions at LHC. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2011 ; Vol. 703, No. 2. pp. 128-134.
@article{6fd0e90299734593b7f68c4324ea9ac0,
title = "Measurement of zero degree single photon energy spectra for √s=7 TeV proton-proton collisions at LHC",
abstract = "In early 2010, the Large Hadron Collider forward (LHCf) experiment measured very forward neutral particle spectra in LHC proton-proton collisions. From a limited data set taken under the best beam conditions (low beam-gas background and low occurrence of pile-up events), the single photon spectra at √s=7 TeV and pseudo-rapidity (Η) ranges from 8.81 to 8.99 and from 10.94 to infinity were obtained for the first time and are reported in this Letter. The spectra from two independent LHCf detectors are consistent with one another and serve as a cross check of the data. The photon spectra are also compared with the predictions of several hadron interaction models that are used extensively for modeling ultra-high energy cosmic-ray showers. Despite conservative estimates for the systematic errors, none of the models agree perfectly with the measurements. A notable difference is found between the data and the DPMJET 3.04 and PYTHIA 8.145 hadron interaction models above 2 TeV where the models predict higher photon yield than the data. The QGSJET II-03 model predicts overall lower photon yield than the data, especially above 2 TeV in the rapidity range 8.81<η<8.99.",
keywords = "Hadron interaction models, LHC, Ultra-high energy cosmic-ray",
author = "O. Adriani and L. Bonechi and M. Bongi and G. Castellini and R. D'Alessandro and A. Faus and K. Fukatsu and M. Haguenauer and Y. Itow and K. Kasahara and K. Kawade and D. Macina and T. Mase and K. Masuda and Y. Matsubara and H. Menjo and G. Mitsuka and Y. Muraki and M. Nakai and K. Noda and P. Papini and Perrot, {A. L.} and S. Ricciarini and T. Sako and Y. Shimizu and K. Suzuki and T. Suzuki and K. Taki and T. Tamura and S. Torii and A. Tricomi and Turner, {W. C.} and J. Velasco and A. Viciani and Kenji Yoshida",
year = "2011",
month = "9",
day = "7",
doi = "10.1016/j.physletb.2011.07.077",
language = "English",
volume = "703",
pages = "128--134",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "2",

}

TY - JOUR

T1 - Measurement of zero degree single photon energy spectra for √s=7 TeV proton-proton collisions at LHC

AU - Adriani, O.

AU - Bonechi, L.

AU - Bongi, M.

AU - Castellini, G.

AU - D'Alessandro, R.

AU - Faus, A.

AU - Fukatsu, K.

AU - Haguenauer, M.

AU - Itow, Y.

AU - Kasahara, K.

AU - Kawade, K.

AU - Macina, D.

AU - Mase, T.

AU - Masuda, K.

AU - Matsubara, Y.

AU - Menjo, H.

AU - Mitsuka, G.

AU - Muraki, Y.

AU - Nakai, M.

AU - Noda, K.

AU - Papini, P.

AU - Perrot, A. L.

AU - Ricciarini, S.

AU - Sako, T.

AU - Shimizu, Y.

AU - Suzuki, K.

AU - Suzuki, T.

AU - Taki, K.

AU - Tamura, T.

AU - Torii, S.

AU - Tricomi, A.

AU - Turner, W. C.

AU - Velasco, J.

AU - Viciani, A.

AU - Yoshida, Kenji

PY - 2011/9/7

Y1 - 2011/9/7

N2 - In early 2010, the Large Hadron Collider forward (LHCf) experiment measured very forward neutral particle spectra in LHC proton-proton collisions. From a limited data set taken under the best beam conditions (low beam-gas background and low occurrence of pile-up events), the single photon spectra at √s=7 TeV and pseudo-rapidity (Η) ranges from 8.81 to 8.99 and from 10.94 to infinity were obtained for the first time and are reported in this Letter. The spectra from two independent LHCf detectors are consistent with one another and serve as a cross check of the data. The photon spectra are also compared with the predictions of several hadron interaction models that are used extensively for modeling ultra-high energy cosmic-ray showers. Despite conservative estimates for the systematic errors, none of the models agree perfectly with the measurements. A notable difference is found between the data and the DPMJET 3.04 and PYTHIA 8.145 hadron interaction models above 2 TeV where the models predict higher photon yield than the data. The QGSJET II-03 model predicts overall lower photon yield than the data, especially above 2 TeV in the rapidity range 8.81<η<8.99.

AB - In early 2010, the Large Hadron Collider forward (LHCf) experiment measured very forward neutral particle spectra in LHC proton-proton collisions. From a limited data set taken under the best beam conditions (low beam-gas background and low occurrence of pile-up events), the single photon spectra at √s=7 TeV and pseudo-rapidity (Η) ranges from 8.81 to 8.99 and from 10.94 to infinity were obtained for the first time and are reported in this Letter. The spectra from two independent LHCf detectors are consistent with one another and serve as a cross check of the data. The photon spectra are also compared with the predictions of several hadron interaction models that are used extensively for modeling ultra-high energy cosmic-ray showers. Despite conservative estimates for the systematic errors, none of the models agree perfectly with the measurements. A notable difference is found between the data and the DPMJET 3.04 and PYTHIA 8.145 hadron interaction models above 2 TeV where the models predict higher photon yield than the data. The QGSJET II-03 model predicts overall lower photon yield than the data, especially above 2 TeV in the rapidity range 8.81<η<8.99.

KW - Hadron interaction models

KW - LHC

KW - Ultra-high energy cosmic-ray

UR - http://www.scopus.com/inward/record.url?scp=80051875955&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80051875955&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2011.07.077

DO - 10.1016/j.physletb.2011.07.077

M3 - Article

AN - SCOPUS:80051875955

VL - 703

SP - 128

EP - 134

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 2

ER -