在√s=200 GeV极化质子-质子碰撞中对Λ和Λ̄超子纵向自旋转移的改进测量
高能物理 - 实验
2019-01-30 v3
摘要
在高能极化质子-质子碰撞中产生的Λ和Λ̄超子的纵向自旋转移D_LL预计对质子的奇异夸克与反夸克螺旋度分布函数以及纵向极化碎裂函数敏感。我们报告了利用RHIC上的STAR探测器在质心能量√s=200 GeV处获取数据而对D_LL作出的改进测量。该数据的优值比先前结果大约高十二倍，并覆盖伪快度|η|<1.2、横动量p_T最高达6 GeV/c的范围。在最大p_T的前向散射半球中，发现Λ超子的纵向自旋转移为D_LL=-0.036±0.048(stat)±0.013(sys)，Λ̄反超子为D_LL=0.032±0.043(stat)±0.013(sys)。给出了对η和p_T的依赖性并与模型评估作了比较。
引用
@article{arxiv.1808.07634,
title = {Improved measurement of the longitudinal spin transfer to $\Lambda$ and $\bar \Lambda$ hyperons in polarized proton-proton collisions at $\sqrt s$ = 200 GeV},
author = {J. Adam and L. Adamczyk and J. R. Adams and J. K. Adkins and G. Agakishiev and M. M. Aggarwal and Z. Ahammed and I. Alekseev and D. M. Anderson and R. Aoyama and A. Aparin and D. Arkhipkin and E. C. Aschenauer and M. U. Ashraf and F. Atetalla and A. Attri and G. S. Averichev and X. Bai and V. Bairathi and K. Barish and A. J. Bassill and A. Behera and R. Bellwied and A. Bhasin and A. K. Bhati and J. Bielcik and J. Bielcikova and L. C. Bland and I. G. Bordyuzhin and J. D. Brandenburg and A. V. Brandin and D. Brown and J. Bryslawskyj and I. Bunzarov and J. Butterworth and H. Caines and M. Calderón de la Barca Sánchez and D. Cebra and R. Cendejas and I. Chakaberia and P. Chaloupka and B. K. Chan and F-H. Chang and Z. Chang and N. Chankova-Bunzarova and A. Chatterjee and S. Chattopadhyay and J. H. Chen and X. Chen and X. Chen and J. Cheng and M. Cherney and W. Christie and G. Contin and H. J. Crawford and M. Csanad and S. Das and T. G. Dedovich and J. Deng and I. M. Deppner and A. A. Derevschikov and L. Didenko and C. Dilks and X. Dong and J. L. Drachenberg and J. C. Dunlop and L. G. Efimov and N. Elsey and J. Engelage and G. Eppley and R. Esha and S. Esumi and O. Evdokimov and J. Ewigleben and O. Eyser and R. Fatemi and S. Fazio and P. Federic and P. Federicova and J. Fedorisin and P. Filip and E. Finch and Y. Fisyak and C. E. Flores and L. Fulek and C. A. Gagliardi and T. Galatyuk and F. Geurts and A. Gibson and D. Grosnick and D. S. Gunarathne and Y. Guo and A. Gupta and W. Guryn and A. I. Hamad and A. Hamed and A. Harlenderova and J. W. Harris and L. He and S. Heppelmann and S. Heppelmann and N. Herrmann and A. Hirsch and L. Holub and Y. Hong and S. Horvat and B. Huang and H. Z. Huang and S. L. Huang and T. Huang and X. Huang and T. J. Humanic and P. Huo and G. Igo and W. W. Jacobs and A. Jentsch and J. Jia and K. Jiang and S. Jowzaee and X. Ju and E. G. Judd and S. Kabana and S. Kagamaster and D. Kalinkin and K. Kang and D. Kapukchyan and K. Kauder and H. W. Ke and D. Keane and A. Kechechyan and D. P. Kikoła and C. Kim and T. A. Kinghorn and I. Kisel and A. Kisiel and L. Kochenda and L. K. Kosarzewski and A. F. Kraishan and L. Kramarik and L. Krauth and P. Kravtsov and K. Krueger and N. Kulathunga and L. Kumar and R. Kunnawalkam Elayavalli and J. Kvapil and J. H. Kwasizur and R. Lacey and J. M. Landgraf and J. Lauret and A. Lebedev and R. Lednicky and J. H. Lee and C. Li and W. Li and X. Li and Y. Li and Y. Liang and J. Lidrych and T. Lin and A. Lipiec and M. A. Lisa and F. Liu and H. Liu and P. Liu and P. Liu and Y. Liu and Z. Liu and T. Ljubicic and W. J. Llope and M. Lomnitz and R. S. Longacre and S. Luo and X. Luo and G. L. Ma and L. Ma and R. Ma and Y. G. Ma and N. Magdy and R. Majka and D. Mallick and S. Margetis and C. Markert and H. S. Matis and O. Matonoha and J. A. Mazer and K. Meehan and J. C. Mei and N. G. Minaev and S. Mioduszewski and D. Mishra and B. Mohanty and M. M. Mondal and I. Mooney and D. A. Morozov and Md. Nasim and J. D. Negrete and J. M. Nelson and D. B. Nemes and M. Nie and G. Nigmatkulov and T. Niida and L. V. Nogach and T. Nonaka and G. Odyniec and A. Ogawa and K. Oh and S. Oh and V. A. Okorokov and D. Olvitt and B. S. Page and R. Pak and Y. Panebratsev and B. Pawlik and H. Pei and C. Perkins and R. L. Pinter and J. Pluta and J. Porter and M. Posik and N. K. Pruthi and M. Przybycien and J. Putschke and A. Quintero and S. K. Radhakrishnan and S. Ramachandran and R. L. Ray and R. Reed and H. G. Ritter and J. B. Roberts and O. V. Rogachevskiy and J. L. Romero and L. Ruan and J. Rusnak and O. Rusnakova and N. R. Sahoo and P. K. Sahu and S. Salur and J. Sandweiss and J. Schambach and A. M. Schmah and W. B. Schmidke and N. Schmitz and B. R. Schweid and F. Seck and J. Seger and M. Sergeeva and R. Seto and P. Seyboth and N. Shah and E. Shahaliev and P. V. Shanmuganathan and M. Shao and F. Shen and W. Q. Shen and S. S. Shi and Q. Y. Shou and E. P. Sichtermann and S. Siejka and R. Sikora and M. Simko and J Singh and S. Singha and D. Smirnov and N. Smirnov and W. Solyst and P. Sorensen and H. M. Spinka and B. Srivastava and T. D. S. Stanislaus and D. J. Stewart and M. Strikhanov and B. Stringfellow and A. A. P. Suaide and T. Sugiura and M. Sumbera and B. Summa and X. M. Sun and X. Sun and Y. Sun and B. Surrow and D. N. Svirida and P. Szymanski and A. H. Tang and Z. Tang and A. Taranenko and T. Tarnowsky and J. H. Thomas and A. R. Timmins and D. Tlusty and T. Todoroki and M. Tokarev and C. A. Tomkiel and S. Trentalange and R. E. Tribble and P. Tribedy and S. K. Tripathy and O. D. Tsai and B. Tu and T. Ullrich and D. G. Underwood and I. Upsal and G. Van Buren and J. Vanek and A. N. Vasiliev and I. Vassiliev and F. Videbæk and S. Vokal and S. A. Voloshin and A. Vossen and F. Wang and G. Wang and P. Wang and Y. Wang and Y. Wang and J. C. Webb and L. Wen and G. D. Westfall and H. Wieman and S. W. Wissink and R. Witt and Y. Wu and Z. G. Xiao and G. Xie and W. Xie and J. Xu and N. Xu and Q. H. Xu and Y. F. Xu and Z. Xu and C. Yang and Q. Yang and S. Yang and Y. Yang and Z. Ye and Z. Ye and L. Yi and K. Yip and I. -K. Yoo and N. Yu and H. Zbroszczyk and W. Zha and J. Zhang and J. Zhang and L. Zhang and S. Zhang and S. Zhang and X. P. Zhang and Y. Zhang and Z. Zhang and J. Zhao and C. Zhong and C. Zhou and X. Zhu and Z. Zhu and M. Zyzak},
journal= {arXiv preprint arXiv:1808.07634},
year = {2019}
}
备注
8 pages, 4 figures