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14 results on '"Huang, Shengli"'

1. Sources of longitudinal flow decorrelations in high-energy nuclear collisions

Author

Jia, Jiangyong, Huang, Shengli, Zhang, Chunjian, and Bhatta, Somadutta

Subjects
Nuclear Theory, High Energy Physics - Phenomenology, Nuclear Experiment
Abstract

The longitudinal structure of the quark-gluon plasma (QGP) consists of several components spanning various scales. However, its short-range features are often obscured by final-state non-flow correlations. Here, we introduce a data-driven approach to separate initial state structures from non-flow effects. The longitudinal structure is found having two distinct components: one that reflects the global twisted geometry of the QGP, and another that captures localized fluctuations in rapidity. The characteristics of this second component, contributing to short- and medium-range flow decorrelations, can be quantified by comparing collisions of nuclei with different shapes. This study represents the first successful attempt to disentangle long- and short-range flow decorrelations from non-flow backgrounds, providing new insights into the initial conditions of heavy-ion collisions., Comment: 6 pages, 4 figures

Published
2024

2. Longitudinal Structure of Quark-Gluon Plasma Unveiled Through Nuclear Deformations

Author

Zhang, Chunjian, Huang, Shengli, and Jia, Jiangyong

Subjects
Nuclear Theory, High Energy Physics - Phenomenology, Nuclear Experiment
Abstract

The study of quark-gluon plasma (QGP) is hindered by our limited understanding of its initial conditions, particularly its longitudinal structure. We propose a novel approach that entails analyzing collisions involving nuclei of similar masses but different deformations. This strategy allows us to vary the initial conditions and collective expansion of the QGP, while minimizing the influence of non-flow correlations. Using a dynamical transport model, we have for the first time extracted the complete longitudinal structure of elliptic flow ($v_2$). Our findings reveal that although deformation significantly enhances the overall magnitude of $v_2$, it does not alter its longitudinal profile. This approach not only enables the separation of the rapidity dependence of flow from its rapidity decorrelations but also prompts further investigation into other nuclear structural features, such as nuclear skin thickness, to advance our understanding of the QGP's initial conditions., Comment: 6 pages, 6 figures

Published
2024

3. Measurements of azimuthal anisotropies in $^{16}$O+$^{16}$O and $\gamma$+Au collisions from STAR

Author

Huang, Shengli

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

In this proceeding, we present the first measurements of azimuthal anisotropies, $v_2$ and $v_3$, in $^{16}$O+$^{16}$O collisions at 200 GeV as a function of transverse momentum and multiplicity, by using two- and four-particle correlation methods. We compare our measurements with STAR measurements of $v_n$ in \dau and \heau collisions to provide insight into the impact of system symmetry on initial condition for small systems. We also investigate the ratio $v_2\{4\}/v_2\{2\}$ as a function of centrality, which is expected to be sensitive to nucleon-nucleon correlation in the $^{16}$O nucleus., Comment: 4 Pages, 3 figures, Quark Matter 2023 Proceeding

Published
2023

4. Imaging the initial condition of heavy-ion collisions and nuclear structure across the nuclide chart

Author

Bally, Benjamin, Brandenburg, James Daniel, Giacalone, Giuliano, Heinz, Ulrich, Huang, Shengli, Jia, Jiangoyng, Lee, Dean, Lee, Yen-Jie, Li, Wei, Loizides, Constantin, Luzum, Matthew, Nijs, Govert, Noronha-Hostler, Jacquelyn, Ploskon, Mateusz, van der Schee, Wilke, Schenke, Bjoern, Shen, Chun, Somà, Vittorio, Timmins, Anthony, Xu, Zhangbu, and Zhou, You

Subjects
Nuclear Experiment, High Energy Physics - Phenomenology, Nuclear Theory
Abstract

A major goal of the hot QCD program, the extraction of the properties of the quark gluon plasma (QGP), is currently limited by our poor knowledge of the initial condition of the QGP, in particular how it is shaped from the colliding nuclei. To attack this limitation, we propose to exploit collisions of selected species to precisely assess how the initial condition changes under variations of the structure of the colliding ions. This knowledge, combined with event-by-event measures of particle correlations in the final state of heavy-ion collisions, will provide in turn a new way to probe the collective structure of nuclei, and to confront and exploit the predictions of state-of-the-art ab initio nuclear structure theories. The US nuclear community should capitalize on this interdisciplinary connection by pursuing collisions of well-motivated species at high-energy colliders., Comment: 23 pages, 6 figures

Published
2022

5. Probing nuclear quadrupole deformation from correlation of elliptic flow and transverse momentum in heavy ion collisions

Author

Jia, Jiangyong, Huang, Shengli, and Zhang, Chunjian

Subjects
Nuclear Theory, High Energy Physics - Phenomenology, Nuclear Experiment, Physics - Atomic Physics
Abstract

In heavy ion collisions, elliptic flow $v_2$ and radial flow, characterized by event-wise average transverse momentum $[p_{\mathrm{T}}]$, are related to the shape and size of the overlap region, which are sensitive to the shape of colliding atomic nuclei. The Pearson correlation coefficient between $v_2$ and $[p_{\mathrm{T}}]$, $\rho_2$, was found to be particularly sensitive to the quadrupole deformation parameter $\beta$ that is traditionally measured in low energy experiments. Built on earlier insight that the prolate deformation $\beta>0$ reduces the $\rho_2$ in ultra-central collisions (UCC), we show that the prolate deformation $\beta<0$ enhances the value of $\rho_2$. As $\beta>0$ and $\beta<0$ are the two extremes of triaxiality, the strength and sign of $v_2^2-[p_{\mathrm{T}}]$ correlation can be used to provide valuable information on the triaxiality of the nucleus. Our study provide further arguments for using the hydrodynamic flow as a precision tool to directly image the deformation of the atomic nuclei at extremely short time scale ($<10^{-24}$s)., Comment: 13 pages, 10 figures, update to the Accepted version

Published
2021
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6. Disentangle contributions to small-system collectivity via scans of light nucleus-nucleus collisions

Author

Huang, Shengli, Chen, Zhenyu, Jia, Jiangyong, and Li, Wei

Subjects
Nuclear Experiment, High Energy Physics - Phenomenology, Nuclear Theory
Abstract

The observation of multi-particle azimuthal correlations in high-energy small-system collisions has led to intense debate on its origin and the possible coexistence from two competing theoretical scenarios: one based on initial-state intrinsic momentum anisotropy (ISM), and the other based on final-state collective response to the collision geometry (FSM). To complement the previous scan of asymmetric collision systems ($p$+Au, $d$+Au and He+Au), we propose a scan of small symmetric collision systems at RHIC, such as C+C, O+O, Al+Al and Ar+Ar $\sqrt{s_{\mathrm{NN}}}=0.2$ TeV, to provide further insights in disentangling contributions from these two scenarios. These symmetric small systems have the advantage of providing a better controlled initial geometry dominated by the average shape of the overlap region, as opposed to fluctuation-driven geometries in asymmetric systems. A transport model is employed to investigate the expected geometry response in the FSM scenario. Different trends of elliptic flow with increasing charge particle multiplicity are observed between symmetric and asymmetric systems, while triangular flow appears to show a similar behavior. Furthermore, a comparison of O+O collisions at $\sqrt{s_{\mathrm{NN}}}=0.2$ TeV and at $\sqrt{s_{\mathrm{NN}}}=2.76-7$ TeV, as proposed at the LHC, provides a unique opportunity to disentangle the collision geometry effects at nucleon level from those arising from subnucleon fluctuations., Comment: 6 pages, 6 figures

Published
2019
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7. Measurements of identified particle anisotropic flow in Cu+Au and U+U collisions by PHENIX experiment

Author

Huang, Shengli

Subjects
Nuclear Experiment
Abstract

In this paper, new measurements of anisotropic flow ($v_{1}$, $v_{2}$) for identified particles such as pions and proton in Cu+Au collisions at 200 GeV and U+U collisions at 193 GeV are reported. The anisotropic flow is studied as a function of $p_{T}$ and centrality in these two collision systems. In ultra-central U+U collisions (0--2% centrality), $v_2$ of protons shows a weak $p_{T}$ dependence for $p_T<$~1.0 GeV/c. A positive $v_1$ for charged pions is observed for $p_{T} >$ 1 GeV/c with respect to the first-order event plane, the angle of which is determined by the Au-going spectators. The scaling of identified particles $v_2$ with the number of valence quarks ($n_q$) has been observed, in different centrality bins, with the transverse kinetic energy in these two collision systems.

Published
2012
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8. Soft and Hard Interactions in proton + proton collisions at sqrt(s)=200GeV

Author

Huang, Shengli

Subjects
Nuclear Experiment
Abstract

We present a detailed study of particle production at mid-rapidity in proton + proton collisions at RHIC for sqrt(s)=200GeV. The transverse momentum spectra and the of inclusive hadrons and identified particles as a function of multiplicity are measured in minimum bias, "soft" and "hard" event classes. It is found that the multiplicity dependence of in soft events in proton + proton collisions does not change from RHIC to Tevetron while there is no such scaling behavior in minimum-bias and hard events. The baryon and strangeness production derived from the particle ratios of K-/pi- and Pbar/pi- are measured to be different in "soft" and "hard" events. These results are compared to model predictions and those from Au+Au collisions at RHIC., Comment: Quark Matter 2004 poster writeup

Published
2004

9. Probing the Gluonic Structure of the Deuteron with J/ψ Photoproduction in d+Au Ultraperipheral Collisions

Author

Abdallah, Mohamed, Aboona, Bassam, Adam, Jaroslav, Adamczyk, Leszek, Adams, Joseph, Adkins, Kevin, Agakishiev, Geydar, Aggarwal, Ishu, Aggarwal, Madan, Ahammed, Zubayer, Aitbaev, A., Alekseev, Igor, Anderson, Derek, Aparin, Alexey, Aschenauer, Elke-Caroline, Ashraf, Muhammad Usman, Atetalla, Fareha, Attri, Anjali, Averichev, Georgy, Bairathi, Vipul, Baker, William, Ball Cap, Jonathan Gonzalo, Barish, Kenneth, Behera, Arabinda, Bellwied, Rene, Bhagat, Pratibha, Bhasin, Anju, Bielcik, Jaroslav, Bielcikova, Jana, Bordyuzhin, Igor, Brandenburg, James, Brandin, Andrei, Bunzarov, Ivan, Cai, Xiang-Zhou, Caines, Helen, Calderon de la Barca Sanchez, Manuel, Cebra, Daniel, Chakaberia, Irakli, Chaloupka, Petr, Chan, Brian, Chang, Feng-Han, Chang, Zilong, Chankova-Bunzarova, Nedialka, Chatterjee, Arghya, Chattopadhyay, Subhasis, Chen, Ding, Chen, Jia, Chen, Jinhui, Chen, Xiaolong, Chen, Zhenyu, Cheng, Jianping, Chevalier, Malia, Choudhury, Subikash, Christie, W., Christie, Bill, Chu, Xiaoxuan, Crawford, Hank, Csanad, Mate, Daugherity, Michael, Dedovich, Tatiana, Deppner, Ingo, Derevschikov, Anatoly, Dhamija, Arushi, Di Carlo, Launa, Didenko, Lidia, Dixit, Prabhupada, Dong, Xin, Drachenberg, James, Duckworth, Eddie, Dunlop, James, Elsey, Nicholas, Engelage, Jack, Eppley, Geary, Esumi, ShinIchi, Evdokimov, Olga, Ewigleben, Annika, Eyser, Oleg, Fatemi, Renee, Fawzi, Fares, Fazio, Salvatore, Federic, Pavol, Fedorisin, Jan, Feng, Chan-Jui, Feng, Yicheng, Filip, Peter, Finch, Evan, Fisyak, Yuri, Francisco, Audrey, Fu, Chuan, Fulek, Lukasz, Gagliardi, Carl, Galatyuk, Tatyana, Geurts, Frank, Ghimire, Navagyan, Gibson, Adam, Gopal, Krishan, Gou, Xingrui, Grosnick, David, Gupta, Anik, Guryn, Wlodek, Hamad, Ayman, Hamed, Ahmed, Han, Yiding, Harabasz, Szymon, Harasty, Matthew, Harris, John, Harrison, Hannah, He, Shu, He, Wanbing, He, Xionghong, He, Yang, Heppelmann, Samuel, Heppelmann, Steven, Herrmann, Norbert, Hoffman, Eric, Holub, Lukas, Hu, C., Hu, Q., Hu, Yu, Huang, Hao, Huang, Huan, Huang, Shengli, Huang, Te-Chuan, Huang, Xinjie, Huang, Yan, Humanic, T.J., Igo, George, Isenhower, Donald, Isshiki, M., Jacobs, William, Jena, Chitrasen, Jentsch, Alexander, Ji, Yuanjing, Jia, Jiangyong, Jiang, Kun, Ju, Xinyue, Judd, Eleanor, Kabana, Sonia, Kabir, Md Latiful, Kagamaster, Skipper, Kalinkin, Dmitry, Kang, Kejun, Kapukchyan, David, Kauder, Kolja, Ke, Hongwei, Keane, Declan, Kechechyan, Armen, Kelsey, Matthew, Khyzhniak, Yevheniia, Kikola, Daniel, Kim, Chong, Kimelman, Benjamin, Kincses, Daniel, Kisel, Ivan, Kiselev, Alexander, Knospe, Anders, Ko, Ho San, Kochenda, Leonid, Korobitsin, A., Kosarzewski, Leszek, Kramarik, Lukas, Kravtsov, Petr, Kumar, Lokesh, Kumar, Shyam, Kunnawalkam Elayavalli, Raghav, Kwasizur, Joseph, Lacey, Roy, Lan, Shaowei, Landgraf, Jeffery, Lauret, Jerome, Lebedev, Alexei, Lednicky, Richard, Lee, Jeong-Hun, Leung, Yue-Hang, Lewis, Nicole, Li, Changfeng, Li, Cheng, Li, Wei, Li, Xin, Li, Yuanjing, Liang, Xilin, Liang, Yue, Licenik, Robert, Lin, Ting, Lin, Yufu, Lisa, Mike, Liu, Feng, Liu, Huanzhao, Liu, Hui, Liu, Peifeng, Liu, Tong, Liu, Xiaoyu, Liu, Yanfang, Liu, Zhen, Ljubicic, Tonko, Llope, W.J., Longacre, R.S., Loyd, Erik, Lu, T., Lukow, Nicholas, Luo, Xiaofeng, Ma, Long, Ma, Rongrong, Ma, Yu-Gang, Magdy Abdelwahab Abdelrahman, Niseem, Mallick, Debasish, Manukhov, S.L., Margetis, Spiros, Markert, Christina, Matis, Howard, Mazer, Joel, Minaev, Nikolai, Mioduszewski, Saskia, Mohanty, Bedanga, Mondal, Mriganka, Mooney, Isaac, Morozov, Dmitry, Mukherjee, Ayon, Nagy, Marton, Nam, J.D., Nasim, Md., Nayak, Kishora, Neff, Dylan, Nelson, John, Nemes, Daniel, Nie, Maowu, Nigmatkulov, Grigory, Niida, Takafumi, Nishitani, Risa, Nogach, Larisa, Nonaka, Toshihiro, Nunes, Ana Sofia, Odyniec, Grazyna, Ogawa, Akio, Oh, Saehanseul, Okorokov, Vitalii, Okubo, K., Page, Brian, Pak, Robert, Pan, Jinjin, Pandav, Ashish, Pandey, Ashutosh, Panebratsev, Yuri, Parfenov, Petr, Pinsky, Lawrence, Paul, A., Pawlik, Bogdan, Pawlowska, Diana, Perkins, Chris, Pluta, Jan, Pokhrel, Babu, Ponimatkin, Georgij, Porter, Jeff, Posik, Matthew, Prozorova, Veronika, Pruthi, Navneet Kumar, Przybycien, Mariusz, Putschke, Joern, Qiu, Hao, Quintero, Amilkar, Racz, Cameron, Radhakrishnan, Sooraj, Raha, Nandita, Ray, Lanny, Reed, Rosi, Ritter, Hans Georg, Robotkova, Monika, Rogachevskiy, Oleg, Romero, Juan, Roy, Diptanil, Ruan, Lijuan, Rusnak, Jan, Sahoo, Aswini, Sahoo, Nihar, Sako, Hiroyuki, Salur, Sevil, Samigullin, E., Sandweiss, Jack, Sato, Susumu, Schmidke, Bill, Schmitz, Norbert, Schweid, Benjamin, Seck, Florian, Seger, Janet, Sergeeva, Maria, Seto, Richard, Seyboth, Peter, Shah, Neha, Shahaliev, Ehtiram, Shanmuganathan, Prashanth, Shao, Ming, Shao, Tianhao, Sharma, R., Sheikh, Ashik Ikbal, Shen, Diyu, Shi, Shusu, Shi, Yingying, Shou, Qi-Ye, Sichtermann, Ernst, Sikora, Rafal, Simko, Miroslav, Singh, Jagbir, Singha, Subhash, Sorensen, Paul, Sinha, P., Skoby, Michael, Smirnov, Nikolai, Soehngen, Yannick, Solyst, William, Song, Youqi, Spinka, H.M., Srivastava, Brijesh, Stanislaus, Shirvel, Stefaniak, Maria, Stewart, David, Strikhanov, Mikhail, Stringfellow, Blair, Suaide, Alexandre Alarcon, Sumbera, Michal, Summa, Branden, Sun, Xiangming, Sun, Xu, Sun, Yongjie, Sun, Yuliang, Surrow, Bernd, Svirida, Dmitry, Sweger, Zachary, Szymanski, Pawel, Tang, Aihong, Tang, Zebo, Taranenko, Arkadiy, Tarnowsky, Terry, Thomas, J.H., Timmins, Anthony, Tlusty, David, Todoroki, Takahito, Tokarev, Michael, Tomkiel, Catherine, Trentalange, Steven, Tribble, Robert, Tribedy, Prithwish, Tripathy, Srikanta Kumar, Truhlar, Tomas, Trzeciak, Barbara, Tsai, Oleg, Tu, Zhoudunming (Kong), Ullrich, Thomas, Underwood, Dave, Upsal, Isaac, Van Buren, Gene, Vanek, Jan, Vasiliev, Alexander, Vassiliev, Iouri, Verkest, Veronica, Videbaek, Flemming, Vokal, Stanislav, Voloshin, Sergei, Wang, Fuqiang, Wang, Gang, Wang, Jiansong, Wang, Pengfei, Wang, Xiaofeng, Wang, Yaping, Wang, Yi, Wang, Zhen, Webb, Jason, Weidenkaff, Philipp, Wen, Liwen, Westfall, Gary, Wieman, Howard, Wissink, Scott, Witt, Richard, Wu, Jin, Wu, Junlin, Wu, Yang, Xi, Baoshan, Xiao, Zhigang, Xie, Guannan, Xie, Wei, Xu, Haojie, Xu, Nu, Xu, Qinghua, Xu, Yike, Xu, Zhangbu, Xu, Zhiwan, Yan, Gaoguo, Yang, Chi, Yang, Qian, Yang, Shuai, Yang, Yi, Ye, Zaochen, Ye, Zhenyu, Yi, Li, Yip, Kin, Yu, Yi, Zbroszczyk, Hanna, Zha, Wangmei, Zhang, ChunJian, Zhang, Dingwei, Zhang, Jinlong, Zhang, Xiaoping, Zhao, F., Zhang, Shenghui, Zhang, Song, Zhang, Yapeng, Zhang, Yifei, Zhang, Yu, Zhang, Zhe-Jia, Zhang, Zhengqiao, Zhang, Ziyue, Zhao, Jie, Zhao, M., Zhou, Chensheng, Zhou, Yingjie, Zhu, Xianglei, Zurek, Maria, and Zyzak, Maksym

Subjects
Nuclear Theory, nucl-th, hep-ex, FOS: Physical sciences, nucl-ex, High Energy Physics - Experiment, Nuclear Theory (nucl-th), High Energy Physics - Experiment (hep-ex), Nuclear Physics - Theory, High Energy Physics::Experiment, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, Particle Physics - Experiment
Abstract

Understanding gluon density distributions and how they are modified in nuclei are among the most important goals in nuclear physics. In recent years, diffractive vector meson production measured in ultra-peripheral collisions (UPCs) at heavy-ion colliders has provided a new tool for probing the gluon density. In this Letter, we report the first measurement of $J/\psi$ photoproduction off the deuteron in UPCs at the center-of-mass energy $\sqrt{s_{_{\rm NN}}}=200~\rm GeV$ in d$+$Au collisions. The differential cross section as a function of momentum transfer $-t$ is measured. In addition, data with a neutron tagged in the deuteron-going Zero-Degree Calorimeter is investigated for the first time, which is found to be consistent with the expectation of incoherent diffractive scattering at low momentum transfer. Theoretical predictions based on the Color Glass Condensate saturation model and the gluon shadowing model are compared with the data quantitatively. A better agreement with the saturation model has been observed. With the current measurement, the results are found to be directly sensitive to the gluon density distribution of the deuteron and the deuteron breakup, which provides insights into the nuclear gluonic structure., Comment: Final published version Phys. Rev. Lett. 128, 122303

Published
2021

10. Experiment review in small system collectivity and thermalization

Author

Huang, Shengli

Subjects
d+au, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, phenix, scaling, ridge, p+p, anisotropy, quark, correlations, small systems, flow, High Energy Physics::Experiment, Nuclear Experiment, sqm16, cumulant, p+au, 3he+au
Abstract

Talk presented at the Strangeness in Quark Matter 2016 conference

Published
2021
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11. DD correlations as a sensitive probe for thermalization in high-energy nuclear collisions

Author

Schweda, Kai Oliver, Zhu, Xianglei, Bleicher, Marcus, Huang, Shengli, Stöcker, Horst, Xu, Nu, and Zhuang, Pengfei

Subjects
High Energy Physics::Lattice, Nuclear Theory, High Energy Physics::Phenomenology, High Energy Physics::Experiment, ddc:530, pacs:25.75.-q, Nuclear Experiment
Abstract

We propose to measure azimuthal correlations of heavy-flavor hadrons to address the status of thermalization at the partonic stage of light quarks and gluons in high-energy nuclear collisions. In particular, we show that hadronic interactions at the late stage cannot significantly disturb the initial back-to-back azimuthal correlations of DDbar pairs. Thus, a decrease or the complete absence of these initial correlations does indicate frequent interactions of heavy-flavor quarks and also light partons in the partonic stage, which are essential for the early thermalization of light partons.

Published
2006

12. DD correlations as a sensitive probe for thermalization in high-energy nuclear collisions

Author

Zhu, Xianglei, Bleicher, Marcus, Huang, Shengli, Schweda, Kai Oliver, Stöcker, Horst, Wöhri, Hermine K., Xu, Nu, and Zhuang, Pengfei

Subjects
High Energy Physics::Lattice, Nuclear Theory, High Energy Physics::Phenomenology, High Energy Physics::Experiment, ddc:530, Nuclear Experiment
Abstract

We propose to measure correlations of heavy-flavor hadrons to address the status of thermalization at the partonic stage of light quarks and gluons in high-energy nuclear collisions, shown on the example of azimuthal correlations of D-Dbar pairs. We show that hadronic interactions at the late stage can not disturb these correlations significantly. Thus, a decrease or the complete absence of these initial correlations indicates frequent interactions of heavy-flavor quarks in the partonic stage. Therefore, early thermalization of light quarks is likely to be reached. PACS numbers: 25.75.-q

Published
2006

13. Imaging the initial condition of heavy-ion collisions and nuclear structure across the nuclide chart

Author

Bally, Benjamin, Brandenburg, James Daniel, Giacalone, Giuliano, Heinz, Ulrich, Huang, Shengli, Jiangyong jia, Lee, Dean, Lee, Yen-Jie, Li, Wei, Loizides, Constantin, Luzum, Matthew, Nijs, Govert, Noronha-Hostler, Jacquelyn, Ploskon, Mateusz, Schee, Wilke, Schenke, Bjoern, Shen, Chun, Somà, Vittorio, Timmins, Anthony, Xu, Zhangbu, Zhou, You, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
heavy ion: scattering, nucl-th, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Theory, collective, imaging, FOS: Physical sciences, hep-ph, nucleus: structure function, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, boundary condition, Nuclear Theory (nucl-th), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Nuclear Physics - Theory, correlation, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], quantum chromodynamics, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), nuclide, Nuclear Experiment, quark gluon: plasma, Particle Physics - Phenomenology
Abstract

A major goal of the hot QCD program, the extraction of the properties of the quark gluon plasma (QGP), is currently limited by our poor knowledge of the initial condition of the QGP, in particular how it is shaped from the colliding nuclei. To attack this limitation, we propose to exploit collisions of selected species to precisely assess how the initial condition changes under variations of the structure of the colliding ions. This knowledge, combined with event-by-event measures of particle correlations in the final state of heavy-ion collisions, will provide in turn a new way to probe the collective structure of nuclei, and to confront and exploit the predictions of state-of-the-art ab initio nuclear structure theories. The US nuclear community should capitalize on this interdisciplinary connection by pursuing collisions of well-motivated species at high-energy colliders., 23 pages, 6 figures

14. Longitudinal Double-Spin Asymmetries for Dijet Production at Intermediate Pseudorapidity in Polarized $pp$ Collisions at $\sqrt{s}$ = 200 GeV

Author

Adam, Jaroslav, Leszek Adamczyk, Adams, Joseph, Adkins, Kevin, Agakishiev, Geydar, Aggarwal, Madan, Ahammed, Zubayer, Ajitanand, Nuggehalli, Alekseev, Igor, Anderson, Derek, Aoyama, Ryo, Aparin, Alexey, Arkhipkin, Dmitry, Aschenauer, Elke-Caroline, Ashraf, Muhammad Usman, Atetalla, Fareha, Attri, Anjali, Averichev, Georgy, Bai, Xiaozhi, Bairathi, Vipul, Barish, Kenneth, Bassill, Aj, Behera, Arabinda, Bellwied, Rene, Bhasin, Anju, Bhati, Ashok, Bielcik, Jaroslav, Bielcikova, Jana, Bland, Leslie, Bordyuzhin, Igor, Brandenburg, James, Brandin, Andrei, Brown, Daniel, Bryslawskyj, Jason, Bunzarov, Ivan, Butterworth, Joseph, Caines, Helen, Calderon La Barca Sanchez, Manuel, Campbell, John, Cebra, Daniel, Chakaberia, Irakli, Chaloupka, Petr, Chang, Feng-Han, Chang, Zilong, Chankova-Bunzarova, Nedialka, Chatterjee, Arghya, Chattopadhyay, Subhasis, Chen, Jinhui, Chen, Xiaolong, Chen, Xurong, Cheng, Jianping, Cherney, Mike, Christie, Bill, Contin, Giacomo, Crawford, Hank, Das, Sabita, Dedovich, Tatiana, Deppner, Ingo, Derevschikov, Anatoly, Didenko, Lidia, Dilks, Christopher, Dong, Xin, Drachenberg, James, Dunlop, James, Efimov, Leonid, Elsey, Nicholas, Engelage, Jack, Eppley, Geary, Esha, Roli, Esumi, Shinichi, Evdokimov, Olga, Ewigleben, Justin, Eyser, Oleg, Fatemi, Renee, Fazio, Salvatore, Federic, Pavol, Federicova, Pavla, Fedorisin, Jan, Filip, Peter, Finch, Evan, Fisyak, Yuri, Flores, Chris, Fulek, Lukasz, Gagliardi, Carl, Galatyuk, Tatyana, Geurts, Frank, Gibson, Adam, Grosnick, David, Gunarathne, Devika, Guo, Yi, Gupta, Anik, Guryn, Wlodek, Hamad, Ayman, Hamed, Ahmed, Harlenderova, Alena, Harris, John, He, Liang, Heppelmann, Steven, Heppelmann, Samuel, Herrmann, Norbert, Hirsch, Andy, Holub, Lukas, Horvat, Stephen, Huang, Xinjie, Huang, Bingchu, Huang, Shengli, Huang, Huan, Huang, Te-Chuan, Humanic, Tom, Huo, Peng, Igo, George, Jacobs, William, Jentsch, Alexander, Jia, Jiangyong, Jiang, Kun, Jowzaee, Sedigheh, Judd, Eleanor, Kabana, Sonya, Kalinkin, Dmitry, Kang, Kejun, Kapukchyan, David, Kauder, Kolja, Ke, Hongwei, Keane, Declan, Kechechyan, Armen, Kikola, Daniel, Kim, Chong, Kinghorn, Todd, Kisel, Ivan, Kisiel, Adam, Kochenda, Leonid, Kosarzewski, Leszek, Kraishan, Amani, Kramarik, Lukas, Krauth, Luke, Kravtsov, Peter, Krueger, Keith, Kulathunga, Nalinda, Kumar, Sumit, Kumar, Lokesh, Kvapil, Jakub, Kwasizur, Joseph, Lacey, Roy, Landgraf, Jeffery, Lauret, Jerome, Lebedev, Alexei, Lednicky, Richard, Lee, Jeong-Hun, Li, Xin, Li, Cheng, Li, Wei, Li, Yuanjing, Liang, Yue, Lidrych, Jindrich, Lin, Ting, Lipiec, Andrzej, Lisa, Mike, Liu, Feng, Liu, Peifeng, Liu, Huanzhao, Liu, Yanfang, Ljubicic, Tonko, Llope, Wj, Lomnitz, Michael, Longacre, Ron, Luo, Xiaofeng, Luo, Siwei, Ma, Guo-Liang, Ma, Yu-Gang, Ma, Long, Ma, Rongrong, Magdy Abdelwahab Abdelrahman, Niseem, Majka, Richard, Mallick, Debasish, Margetis, Spiros, Markert, Christina, Matis, Howard, Matonoha, Oliver, Mayes, David, Mazer, Joel, Meehan, Kathryn, Mei, Jincheng, Minaev, Nikolai, 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Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, High Energy Physics - Experiment
Abstract

We present the first measurements of the longitudinal double-spin asymmetry $A_{LL}$ for dijets with at least one jet reconstructed within the pseudorapidity range $0.8 < \eta < 1.8$. The dijets were measured in polarized $pp$ collisions at a center-of-mass energy $\sqrt{s}$ = 200 GeV. Values for $A_{LL}$ are determined for several distinct event topologies, defined by the jet pseudorapidities, and span a range of parton momentum fraction $x$ down to $x \sim$ 0.01. The measured asymmetries are found to be consistent with the predictions of global analyses that incorporate the results of previous RHIC measurements. They will provide new constraints on $\Delta g(x)$ in this poorly constrained region when included in future global analyses.

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