학술논문

Tomography of Ultra-relativistic Nuclei with Polarized Photon-gluon Collisions
Document Type
Working Paper
Author
STAR CollaborationAbdallah, M. S.Aboona, B. E.Adam, J.Adamczyk, L.Adams, J. R.Adkins, J. K.Agakishiev, G.Aggarwal, I.Aggarwal, M. M.Ahammed, Z.Aitbaev, A.Alekseev, I.Anderson, D. M.Aparin, A.Aschenauer, E. C.Ashraf, M. U.Atetalla, F. G.Averichev, G. S.Bairathi, V.Baker, W.Cap, J. G. BallBarish, K.Behera, A.Bellwied, R.Bhagat, P.Bhasin, A.Bielcik, J.Bielcikova, J.Bordyuzhin, I. G.Brandenburg, J. D.Brandin, A. V.Cai, X. Z.Caines, H.Sánchez, M. Calderón de la BarcaCebra, D.Chakaberia, I.Chaloupka, P.Chan, B. K.Chang, F-H.Chang, Z.Chatterjee, A.Chattopadhyay, S.Chen, D.Chen, J.Chen, J. H.Chen, X.Chen, Z.Cheng, J.Choudhury, S.Christie, W.Chu, X.Crawford, H. J.Csanád, M.Daugherity, M.Dedovich, T. G.Deppner, I. M.Derevschikov, A. A.Dhamija, A.Di Carlo, L.Didenko, L.Dixit, P.Dong, X.Drachenberg, J. L.Duckworth, E.Dunlop, J. C.Engelage, J.Eppley, G.Esumi, S.Evdokimov, O.Ewigleben, A.Eyser, O.Fatemi, R.Fawzi, F. M.Fazio, S.Feng, C. J.Feng, Y.Finch, E.Fisyak, Y.Francisco, A.Fu, C.Gagliardi, C. A.Galatyuk, T.Geurts, F.Ghimire, N.Gibson, A.Gopal, K.Gou, X.Grosnick, D.Gupta, A.Guryn, W.Hamed, A.Han, Y.Harabasz, S.Harasty, M. D.Harris, J. W.Harrison, H.He, S.He, W.He, X. H.He, Y.Heppelmann, S.Herrmann, N.Hoffman, E.Holub, L.Hu, C.Hu, Q.Hu, Y.Huang, H.Huang, H. Z.Huang, S. L.Huang, T.Huang, X.Huang, Y.Humanic, T. J.Isenhower, D.Isshiki, M.Jacobs, W. W.Jena, C.Jentsch, A.Ji, Y.Jia, J.Jiang, K.Ju, X.Judd, E. G.Kabana, S.Kabir, M. L.Kagamaster, S.Kalinkin, D.Kang, K.Kapukchyan, D.Kauder, K.Ke, H. W.Keane, D.Kechechyan, A.Kelsey, M.Kikoła, D. P.Kimelman, B.Kincses, D.Kisel, I.Kiselev, A.Klein, S. R.Knospe, A. G.Ko, H. S.Kochenda, L.Korobitsin, A.Kosarzewski, L. K.Kramarik, L.Kravtsov, P.Kumar, L.Kumar, S.Elayavalli, R. KunnawalkamKwasizur, J. H.Lacey, R.Lan, S.Landgraf, J. M.Lauret, J.Lebedev, A.Lednicky, R.Lee, J. H.Leung, Y. H.Lewis, N.Li, C.Li, W.Li, X.Li, Y.Liang, X.Liang, Y.Licenik, R.Lin, T.Lin, Y.Lisa, M. A.Liu, F.Liu, H.Liu, P.Liu, T.Liu, X.Liu, Y.Liu, Z.Ljubicic, T.Llope, W. J.Longacre, R. S.Loyd, E.Lu, T.Lukow, N. S.Luo, X. F.Ma, L.Ma, R.Ma, Y. G.Magdy, N.Mallick, D.Manukhov, S. L.Margetis, S.Markert, C.Matis, H. S.Mazer, J. A.Minaev, N. G.Mioduszewski, S.Mohanty, B.Mondal, M. M.Mooney, I.Morozov, D. A.Mukherjee, A.Nagy, M.Nam, J. D.Nasim, Md.Nayak, K.Neff, D.Nelson, J. M.Nemes, D. B.Nie, M.Nigmatkulov, G.Niida, T.Nishitani, R.Nogach, L. V.Nonaka, T.Nunes, A. S.Odyniec, G.Ogawa, A.Oh, S.Okorokov, V. A.Okubo, K.Page, B. S.Pak, R.Pan, J.Pandav, A.Pandey, A. K.Panebratsev, Y.Parfenov, P.Paul, A.Pawlik, B.Pawlowska, D.Perkins, C.Pluta, J.Pokhrel, B. R.Porter, J.Posik, M.Prozorova, V.Pruthi, N. K.Przybycien, M.Putschke, J.Qiu, H.Quintero, A.Racz, C.Radhakrishnan, S. K.Raha, N.Ray, R. L.Reed, R.Ritter, H. G.Robotkova, M.Romero, J. L.Roy, D.Ruan, L.Sahoo, A. K.Sahoo, N. R.Sako, H.Salur, S.Samigullin, E.Sandweiss, J.Sato, S.Schmidke, W. B.Schmitz, N.Schweid, B. R.Seck, F.Seger, J.Seto, R.Seyboth, P.Shah, N.Shahaliev, E.Shanmuganathan, P. V.Shao, M.Shao, T.Sharma, R.Sheikh, A. I.Shen, D. Y.Shi, S. S.Shi, Y.Shou, Q. Y.Sichtermann, E. P.Sikora, R.Singh, J.Singha, S.Sinha, P.Skoby, M. J.Smirnov, N.Söhngen, Y.Solyst, W.Song, Y.Spinka, H. M.Srivastava, B.Stanislaus, T. D. S.Stefaniak, M.Stewart, D. J.Strikhanov, M.Stringfellow, B.Suaide, A. A. P.Sumbera, M.Sun, X. M.Sun, X.Sun, Y.Surrow, B.Svirida, D. N.Sweger, Z. W.Szymanski, P.Tang, A. H.Tang, Z.Taranenko, A.Tarnowsky, T.Thomas, J. H.Timmins, A. R.Tlusty, D.Todoroki, T.Tokarev, M.Tomkiel, C. A.Trentalange, S.Tribble, R. E.Tribedy, P.Tripathy, S. K.Truhlar, T.Trzeciak, B. A.Tsai, O. D.Tu, Z.Ullrich, T.Underwood, D. G.Upsal, I.Van Buren, G.Vanek, J.Vasiliev, A. N.Vassiliev, I.Verkest, V.Videbæk, F.Vokal, S.Voloshin, S. A.Wang, F.Wang, G.Wang, J. S.Wang, P.Wang, X.Wang, Y.Wang, Z.Webb, J. C.Weidenkaff, P. C.Westfall, G. D.Wieman, H.Wissink, S. W.Witt, R.Wu, J.Wu, Y.Xi, B.Xiao, Z. G.Xie, G.Xie, W.Xu, H.Xu, N.Xu, Q. H.Xu, Y.Xu, Z.Yan, G.Yang, C.Yang, Q.Yang, S.Yang, Y.Ye, Z.Yi, L.Yip, K.Yu, Y.Zbroszczyk, H.Zha, W.Zhang, C.Zhang, D.Zhang, J.Zhang, S.Zhang, Y.Zhang, Z. J.Zhang, Z.Zhao, F.Zhao, J.Zhao, M.Zhou, C.Zhou, Y.Zhu, X.Zurek, M.Zyzak, M.
Source
STAR Collaboration, Sci. Adv. 9, abq3903 (2023)
Subject
Nuclear Experiment
Nuclear Theory
Quantum Physics
Language
Abstract
A linearly polarized photon can be quantized from the Lorentz-boosted electromagnetic field of a nucleus traveling at ultra-relativistic speed. When two relativistic heavy nuclei pass one another at a distance of a few nuclear radii, the photon from one nucleus may interact through a virtual quark-antiquark pair with gluons from the other nucleus forming a short-lived vector meson (e.g. ${\rho^0}$). In this experiment, the polarization was utilized in diffractive photoproduction to observe a unique spin interference pattern in the angular distribution of ${\rho^0\rightarrow\pi^+\pi^-}$ decays. The observed interference is a result of an overlap of two wave functions at a distance an order of magnitude larger than the ${\rho^0}$ travel distance within its lifetime. The strong-interaction nuclear radii were extracted from these diffractive interactions, and found to be $6.53\pm 0.06$ fm ($^{197} {\rm Au }$) and $7.29\pm 0.08$ fm ($^{238} {\rm U}$), larger than the nuclear charge radii. The observable is demonstrated to be sensitive to the nuclear geometry and quantum interference of non-identical particles.