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論文

Recent results from the LHCf and RHICf experiments

伊藤 好孝*; 谷田 聖; 他30名*

EPJ Web of Conferences, 208, p.05004_1 - 05004_8, 2019/05

BB2019-0930.pdf:1.22MB

 被引用回数:0 パーセンタイル:0.07

The Large Hadron Collider forward and the Relativistic Heavy Ion Collider forward experiments measured forward particles produced in high-energy hadron collisions at the LHC and RHIC. Using compact calorimeters neutral particles produced in pseudorapidities $$eta > 8.4$$ and $$eta > 6.0$$ are observed by the respective experiments. Because the collision energies ranging from 0.51 TeV to 13 TeV correspond to the cosmic-ray equivalent energies of $$10^{14}$$ to $$10^{17}$$ eV, the measurements are important to understand the hadronic interaction relevant to extensive air shower measurements. This paper reviews recent results of LHCf and initial performance of RHICf that took data in the 2017 RHIC operation.

論文

Transverse single spin asymmetry for very forward $$pi^0$$ production in polarized proton-proton collisions at $$sqrt s$$ = 510 GeV

Kim, M. H.*; 谷田 聖; 他20名*

EPJ Web of Conferences, 208, p.05007_1 - 05007_4, 2019/05

 被引用回数:0 パーセンタイル:0.07

Transverse single spin asymmetry, $$A_{N}$$, of very forward $$pi^{0}$$ production from polarized $$p + p$$ collisions provides new information toward an understanding of its production mechanism. $$A_{N}$$ of forward $$pi^{0}$$ in the pseudorapidity region of $$3 < eta < 4$$ has been described by the partonic structure of the proton in the perturbative QCD framework. However, recent data indicates a potential contribution from not only partonic but also diffractive interactions. In order to provide a new insight on the origin of the $$A_{N}$$, we measured the very forward $$pi^{0}$$ production in the pseudorapidity region of $$6 < eta$$ from $$sqrt{s}$$ = 510 GeV polarized $$p + p$$ collisions at RHIC in 2017. We report our measurement of the very forward $$pi^{0}$$ over the transverse momentum range of $$0 < p_{T} < 1$$ GeV/$$c$$ and the preliminary result.

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