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arXiv · 2303.07190

Transverse single-spin asymmetry of midrapidity $\pi^{0}$ and $\eta$ mesons in $p$+Au and $p$+Al collisions at $\sqrt{s_{_{NN}}}=$ 200 GeV

N. J. Abdulameer·U. Acharya·C. Aidala·Y. Akiba·M. Alfred·V. Andrieux·N. Apadula·H. Asano·B. Azmoun·V. Babintsev·N. S. Bandara·K. N. Barish·S. Bathe·A. Bazilevsky·M. Beaumier·R. Belmont·A. Berdnikov·Y. Berdnikov·L. Bichon·B. Blankenship·D. S. Blau·J. S. Bok·V. Borisov·M. L. Brooks·J. Bryslawskyj·V. Bumazhnov·S. Campbell·V. Canoa Roman·R. Cervantes·M. Chiu·C. Y. Chi·I. J. Choi·J. B. Choi·Z. Citron·M. Connors·R. Corliss·Y. Corrales Morales·N. Cronin·M. Csanád·T. Csörgő·T. W. Danley·M. S. Daugherity·G. David·C. T. Dean·K. DeBlasio·K. Dehmelt·A. Denisov·A. Deshpande·E. J. Desmond·A. Dion·D. Dixit·V. Doomra·J. H. Do·A. Drees·K. A. Drees·J. M. Durham·A. Durum·H. En'yo·A. Enokizono·R. Esha·B. Fadem·W. Fan·N. Feege·D. E. Fields·M. Finger, Jr.·M. Finger·D. Firak·D. Fitzgerald·S. L. Fokin·J. E. Frantz·A. Franz·A. D. Frawley·Y. Fukuda·P. Gallus·C. Gal·P. Garg·H. Ge·M. Giles·F. Giordano·Y. Goto·N. Grau·S. V. Greene·M. Grosse Perdekamp·T. Gunji·H. Guragain·T. Hachiya·J. S. Haggerty·K. I. Hahn·H. Hamagaki·H. F. Hamilton·J. Hanks·S. Y. Han·M. Harvey·S. Hasegawa·T. O. S. Haseler·T. K. Hemmick·X. He·J. C. Hill·K. Hill·A. Hodges
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Abstract

Presented are the first measurements of the transverse single-spin asymmetries ($A_N$) for neutral pions and eta mesons in $p$+Au and $p$+Al collisions at $\sqrt{s_{_{NN}}}=200$ GeV in the pseudorapidity range $|\eta|<$0.35 with the PHENIX detector at the Relativistic Heavy Ion Collider. The asymmetries are consistent with zero, similar to those for midrapidity neutral pions and eta mesons produced in $p$+$p$ collisions. These measurements show no evidence of additional effects that could potentially arise from the more complex partonic environment present in proton-nucleus collisions.

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N. J. Abdulameer, U. Acharya, C. Aidala, Y. Akiba, M. Alfred, V. Andrieux, N. Apadula, H. Asano, B. Azmoun, V. Babintsev, N. S. Bandara, K. N. Barish, S. Bathe, A. Bazilevsky, M. Beaumier, R. Belmont, A. Berdnikov, Y. Berdnikov, L. Bichon, B. Blankenship, D. S. Blau, J. S. Bok, V. Borisov, M. L. Brooks, J. Bryslawskyj, V. Bumazhnov, S. Campbell, V. Canoa Roman, R. Cervantes, M. Chiu, C. Y. Chi, I. J. Choi, J. B. Choi, Z. Citron, M. Connors, R. Corliss, Y. Corrales Morales, N. Cronin, M. Csanád, T. Csörgő, T. W. Danley, M. S. Daugherity, G. David, C. T. Dean, K. DeBlasio, K. Dehmelt, A. Denisov, A. Deshpande, E. J. Desmond, A. Dion, D. Dixit, V. Doomra, J. H. Do, A. Drees, K. A. Drees, J. M. Durham, A. Durum, H. En'yo, A. Enokizono, R. Esha, B. Fadem, W. Fan, N. Feege, D. E. Fields, M. Finger, Jr., M. Finger, D. Firak, D. Fitzgerald, S. L. Fokin, J. E. Frantz, A. Franz, A. D. Frawley, Y. Fukuda, P. Gallus, C. Gal, P. Garg, H. Ge, M. Giles, F. Giordano, Y. Goto, N. Grau, S. V. Greene, M. Grosse Perdekamp, T. Gunji, H. Guragain, T. Hachiya, J. S. Haggerty, K. I. Hahn, H. Hamagaki, H. F. Hamilton, J. Hanks, S. Y. Han, M. Harvey, S. Hasegawa, T. O. S. Haseler, T. K. Hemmick, X. He, J. C. Hill, K. Hill, A. Hodges. 2023-03-13. Transverse single-spin asymmetry of midrapidity $\pi^{0}$ and $\eta$ mesons in $p$+Au and $p$+Al collisions at $\sqrt{s_{_{NN}}}=$ 200 GeV. https://arxiv.org/abs/2303.07190

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