LHCf Measurements of Very Forward Particles at LHC

Sako, T.; Adriani, O.; Bonechi, L.; Bongi, M.; Castellini, G.; D’Alessandro, R.; Fukatsu, K.; Hagenauer, 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.; Suzuki, K.; Suzuki, T.; Shimizu, Yuki; Taki, K.; Tamura, T.; Torii, Shoji; Tricomi, A.; Turner, Mark D.; Yoshida, W. C. Turner K; Yoshida, Kenji

doi:10.48550/arxiv.1010.0195

Cited by 4 publications

(6 citation statements)

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“…In cosmic ray applications we are sensitive essentially to the large x F region (the fragmentation region) and hence we can try to answer this question using the CGC formalism and the expressions derived in the preceding sections. An additional motivation for this calculation is the fact that, in the near future, Feynman scaling (or its violation) will be investigated experimentally at the LHC by the LHCf Collaboration [37,38].…”

Section: Resultsmentioning

confidence: 99%

Baryon stopping in the color glass condensate formalism: A phenomenological study

et al. 2014

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The net-baryon production at forward rapidities is investigated considering the Color Glass Condensate formalism. We assume that at large energies the coherence of the projectile quarks is lost and that the leading baryon production mechanism changes from recombination to independent fragmentation. The phenomenological implications for net-baryon production in pp/pA/AA collisions are analysed and predictions for LHC energies are presented.

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Section: Resultsmentioning

confidence: 99%

Baryon stopping in the color glass condensate formalism: A phenomenological study

et al. 2014

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“…Finally, it allows to investigate the relation between the Feynman scaling (or its violation) and the description of the QCD dynamics at high energies. It is important to emphasize that, in the near future, Feynman scaling will be investigated experimentally at the LHC by the LHCf Collaboration [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Gluon saturation and Feynman scaling in leading neutron production

et al. 2016

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In this paper we extend the color dipole formalism to the study of leading neutron production in $e + p \rightarrow e + n + X$ collisions at high energies and estimate the related observables, which were measured at HERA and may be analysed in future electron-proton ($ep$) colliders. In particular, we calculate the Feynman $x_F$ distribution of leading neutrons, which is expressed in terms of the pion flux and the photon-pion total cross section. In the color dipole formalism, the photon-pion cross section is described in terms of the dipole-pion scattering amplitude, which contains information about the QCD dynamics at high energies and gluon saturation effects. We consider different models for the scattering amplitude, which have been used to describe the inclusive and diffractive $ep$ HERA data. Moreover, the model dependence of our predictions with the description of the pion flux is analysed in detail. We show that the recently released H1 leading neutron spectra can be reproduced using the color dipole formalism and that these spectra could help us to observe more clearly gluon saturation effects in future $ep$ colliders.Comment: 10 pages, 5 figure

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“…The possible Feynman scaling violation at superhigh energies was discussed in [6], based on Monte Carlo calculations. These effects are, as a rule, numerically not large, and so it is more suitable to consider the ratios of the spectra at different energies.…”

Section: The Ratios Of the Inclusive Spectra Of Baryons At Different ...mentioning

confidence: 99%

“…Despite the lack of direct measurements of Feynman scaling violation for secondary baryon spectra in nucleon-nucleon collisions at energies higher than those of ISR, some experimental information from cosmic ray experiments seems to confirm [3,4,5] the presence of significant Feynman scaling violation effects. Now the LHCf Collaboration has started the search [6,7] of Feynman scaling violation effects for the spectra of photons (π 0 ) and neutrons in the fragmentation region at LHC energies.…”

Section: Introductionmentioning

confidence: 99%

Feynman scaling violation due to baryon number diffusion in rapidity space

Arakelyan¹,

Merino²,

Pajares³

et al. 2011

Preprint

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A significant asymmetry in baryon/antibaryon yields in the central region of high energy collisions is observed when the initial state has non-zero baryon charge. This asymmetry is connected with the possibility of a baryon charge diffusion in rapidity space. Evidently, such a diffusion should decrease the baryon charge in the fragmentation region leading to the corresponding decrease of the multiplicity of leading baryons. As a result, a new mechanism for Feynman scaling violation in the fragmentation region is obtained. We present the quantitative predictions for the Feynman scaling violation at LHC energies and even at higher energies that can be important for cosmic ray physics.

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LHCf Measurements of Very Forward Particles at LHC

Cited by 4 publications

References 0 publications

Baryon stopping in the color glass condensate formalism: A phenomenological study

Baryon stopping in the color glass condensate formalism: A phenomenological study

Gluon saturation and Feynman scaling in leading neutron production

Feynman scaling violation due to baryon number diffusion in rapidity space

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