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Cross sections of η mesons in p + p collisi

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We present the first measurements of the forward and midrapidity η -meson cross sections from p + p collisions at s = 500 and 510 GeV, respectively. We also report the midrapidity η / π 0 ratio at 510 GeV. The forward cross section is measured differentially in η -meson transverse momentum ( p T ) from 1.0 to 6.5     GeV / c for pseudorapidity 3.0 < | η | < 3.8 . The midrapidity cross section is measured from 3.5 to 44     GeV / c for pseudorapidity | η | < 0.35 . Both cross sections serve as critical inputs to an updated global analysis of the η -meson fragmentation functions.
American Physical Society (APS)
N. J. Abdulameer U. Acharya A. Adare C. Aidala N. N. Ajitanand Y. Akiba R. Akimoto H. Al-Ta’ani J. Alexander M. Alfred D. Anderson K. R. Andrews A. Angerami S. Antsupov K. Aoki N. Apadula E. Appelt Y. Aramaki R. Armendariz H. Asano E. C. Aschenauer E. T. Atomssa T. C. Awes B. Azmoun V. Babintsev M. Bai N. S. Bandara B. Bannier E. Bannikov K. N. Barish B. Bassalleck A. T. Basye S. Bathe V. Baublis C. Baumann A. Bazilevsky M. Beaumier S. Beckman R. Belmont J. Ben-Benjamin R. Bennett A. Berdnikov Y. Berdnikov L. Bichon D. Black B. Blankenship D. S. Blau J. S. Bok V. Borisov K. Boyle M. L. Brooks D. Broxmeyer J. Bryslawskyj H. Buesching V. Bumazhnov G. Bunce S. Butsyk S. Campbell P. Castera P. Chaitanya C.-H. Chen D. Chen C. Y. Chi C. Chiu M. Chiu I. J. Choi J. B. Choi R. K. Choudhury P. Christiansen T. Chujo O. Chvala V. Cianciolo Z. Citron B. A. Cole Z. Conesa del Valle M. Connors R. Corliss M. Csanád T. Csörgő T. Csörgő L. D’Orazio S. Dairaku A. Datta M. S. Daugherity G. David M. K. Dayananda K. DeBlasio K. Dehmelt A. Denisov A. Deshpande E. J. Desmond K. V. Dharmawardane O. Dietzsch L. Ding A. Dion M. Donadelli V. Doomra J. H. Do O. Drapier A. Drees K. A. Drees J. M. Durham A. Durum Y. V. Efremenko H. En’yo T. Engelmore A. Enokizono R. Esha B. Fadem N. Feege D. E. Fields M. Finger M. Finger D. Firak D. Fitzgerald F. Fleuret S. L. Fokin J. E. Frantz A. Franz A. D. Frawley Y. Fukao T. Fusayasu P. Gallus C. Gal P. Garg I. Garishvili H. Ge F. Giordano A. Glenn X. Gong M. Gonin Y. Goto R. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp T. Gunji L. Guo T. Guo H. Guragain H.-Å. Gustafsson Y. Gu T. Hachiya J. S. Haggerty K. I. Hahn H. Hamagaki J. Hamblen J. Hanks R. Han S. Y. Han C. Harper S. Hasegawa K. Hashimoto E. Haslum R. Hayano T. K. Hemmick T. Hester X. He J. C. Hill A. Hodges R. S. Hollis W. Holzmann K. Homma B. Hong T. Horaguchi Y. Hori D. Hornback T. Hoshino J. Huang T. Ichihara R. Ichimiya H. Iinuma Y. Ikeda K. Imai Y. Imazu M. Inaba A. Iordanova D. Isenhower M. Ishihara M. Issah D. Ivanishchev Y. Iwanaga B. V. Jacak S. J. Jeon M. Jezghani X. Jiang Z. Ji B. M. Johnson D. John T. Jones E. Joo K. S. Joo D. Jouan D. S. Jumper J. Kamin S. Kaneti B. H. Kang J. H. Kang J. S. Kang J. Kapustinsky K. Karatsu M. Kasai G. Kasza D. Kawall A. V. Kazantsev T. Kempel J. A. Key V. Khachatryan A. Khanzadeev K. Kihara K. M. Kijima B. I. Kim C. Kim D. H. Kim D. J. Kim E.-J. Kim H.-J. Kim M. Kim Y.-J. Kim Y. K. Kim E. Kinney Á. Kiss E. Kistenev J. Klatsky D. Kleinjan P. Kline T. Koblesky L. Kochenda M. Kofarago B. Komkov M. Konno J. Koster D. Kotov L. Kovacs A. Král G. J. Kunde K. Kurita M. Kurosawa Y. Kwon G. S. Kyle Y. S. Lai J. G. Lajoie D. Larionova A. Lebedev D. M. Lee J. Lee K. B. Lee K. S. Lee S. H. Lee S. R. Lee M. J. Leitch M. A. L. Leite M. Leitgab S. H. Lim L. A. Linden Levy H. Liu M. X. Liu X. Li D. A. Loomis B. Love D. Lynch S. Lökös C. F. Maguire Y. I. Makdisi M. Makek A. Manion V. I. Manko E. Mannel Y. Mao H. Masui M. McCumber P. L. McGaughey D. McGlinchey C. McKinney N. Means A. Meles M. Mendoza B. Meredith Y. Miake T. Mibe A. C. Mignerey K. Miki A. J. Miller A. Milov D. K. Mishra J. T. Mitchell M. Mitrankova Iu. Mitrankov Y. Miyachi S. Miyasaka S. Mizuno A. K. Mohanty P. Montuenga H. J. Moon T. Moon Y. Morino A. Morreale D. P. Morrison S. Motschwiller T. V. Moukhanova B. Mulilo T. Murakami J. Murata A. Mwai S. Nagamiya J. L. Nagle M. Naglis M. I. Nagy I. Nakagawa H. Nakagomi Y. Nakamiya K. R. Nakamura T. Nakamura K. Nakano C. Nattrass P. K. Netrakanti J. Newby M. Nguyen M. Nihashi T. Niida R. Nouicer N. Novitzky G. Nukazuka A. S. Nyanin E. O’Brien C. Oakley C. A. Ogilvie K. Okada M. Oka J. D. Orjuela Koop M. Orosz A. Oskarsson M. Ouchida K. Ozawa R. Pak V. Pantuev V. Papavassiliou B. H. Park I. H. Park J. S. Park S. Park S. K. Park L. Patel M. Patel S. F. Pate H. Pei J.-C. Peng H. Pereira D. V. Perepelitsa G. D. N. Perera D. Yu. Peressounko J. Perry R. Petti C. Pinkenburg R. Pinson R. P. Pisani M. Potekhin M. Proissl M. L. Purschke H. Qu J. Rak I. Ravinovich K. F. Read K. Reygers D. Reynolds V. Riabov Y. Riabov E. Richardson D. Richford N. Riveli D. Roach G. Roche S. D. Rolnick M. Rosati S. S. E. Rosendahl Z. Rowan J. G. Rubin B. Sahlmueller N. Saito T. Sakaguchi H. Sako V. Samsonov S. Sano M. Sarsour S. Sato T. Sato M. Savastio S. Sawada B. Schaefer B. K. Schmoll K. Sedgwick J. Seele R. Seidl A. Seleznev A. Sen R. Seto P. Sett A. Sexton D. Sharma I. Shein T.-A. Shibata K. Shigaki M. Shimomura H. H. Shim K. Shoji P. Shukla A. Sickles C. L. Silva D. Silvermyr C. Silvestre K. S. Sim B. K. Singh C. P. Singh V. Singh M. Slunečka K. L. Smith T. Sodre R. A. Soltz W. E. Sondheim S. P. Sorensen I. V. Sourikova P. W. Stankus E. Stenlund M. Stepanov S. P. Stoll T. Sugitate A. Sukhanov T. Sumita J. Sun Z. Sun J. Sziklai E. M. Takagui A. Takahara A. Taketani R. Tanabe Y. Tanaka S. Taneja K. Tanida M. J. Tannenbaum S. Tarafdar A. Taranenko E. Tennant H. Themann D. Thomas A. Timilsina T. Todoroki M. Togawa L. Tomášek M. Tomášek H. Torii M. Towell R. Towell R. S. Towell I. Tserruya Y. Tsuchimoto B. Ujvari K. Utsunomiya C. Vale H. W. van Hecke M. Vargyas E. Vazquez-Zambrano A. Veicht J. Velkovska M. Virius A. Vossen V. Vrba E. Vznuzdaev R. Vértesi X. R. Wang D. Watanabe K. Watanabe Y. Watanabe Y. S. Watanabe F. Wei R. Wei J. Wessels S. Whitaker S. N. White D. Winter S. Wolin C. L. Woody R. M. Wright M. Wysocki B. Xia L. Xue S. Yalcin Y. L. Yamaguchi R. Yang A. Yanovich J. Ying S. Yokkaichi I. Yoon J. S. Yoo G. R. Young I. Younus Z. You I. E. Yushmanov W. A. Zajc A. Zelenski S. Zhou
Title: Cross sections of η mesons in p + p collisi
Description:
We present the first measurements of the forward and midrapidity η -meson cross sections from p + p collisions at s = 500 and 510 GeV, respectively.
We also report the midrapidity η / π 0 ratio at 510 GeV.
The forward cross section is measured differentially in η -meson transverse momentum ( p T ) from 1.
0 to 6.
5     GeV / c for pseudorapidity 3.
0 < | η | < 3.
8 .
The midrapidity cross section is measured from 3.
5 to 44     GeV / c for pseudorapidity | η | < 0.
35 .
Both cross sections serve as critical inputs to an updated global analysis of the η -meson fragmentation functions.

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