DOE OSTI · 3012724
Measurement of medium-induced acoplanarity in central Au-Au and 𝑝𝑝 collisions at $\sqrt{s_{NN}}$ = 200 GeV using direct-photon + jet and 𝜋 0 + jet correlations
Abstract
The STAR Collaboration reports measurements of acoplanarity using semi-inclusive distributions of charged-particle jets recoiling from direct photon and 𝜋 0 triggers, in central Au–Au and 𝑝𝑝 collisions at $\sqrt{s_{NN}}$ = 200 GeV. Significant medium-induced acoplanarity broadening is observed for large but not small recoil jet resolution parameter, corresponding to recoil jet yield enhancement up to a factor of ≈ 20 for trigger-recoil azimuthal separation far from 𝜋. This phenomenology is indicative of the response of the quark-gluon plasma to excitation, but not the scattering of jets off of its quasiparticles. As a result, the measurements are not well described by current theoretical models which incorporate jet quenching.
Explore related subjects
Keep this discovery
Explore connections, maps & timelines
Aboona, B. E. [Texas A&M University], Adam, J. [Czech Technical University in Prague], Adamczyk, L. [AGH University of Krakow], Aggarwal, I. [Panjab University], Aggarwal, M. M. [Panjab University], Ahammed, Z. [Variable Energy Cyclotron Centre], Alshammri, A. K. [Kent State University], Anderson, D. M. [Texas A&M University], Aschenauer, E. C. [Brookhaven National Laboratory], Aslam, S. [Fudan University], Atchison, J. [Abilene Christian University], Bairathi, V. [Instituto de Alta Investigación], Bao, X. [Shandong University], Barik, P. [Indian Institute of Science Education and Research (IISER)], Barish, K. [University of California], Behera, S. [Indian Institute of Science Education and Research (IISER) Tirupati], Bellwied, R. [University of Houston], Bhagat, P. [University of Jammu], Bhasin, A. [University of Jammu], Bhatta, S. [State University of New York], Bhosale, S. R. [AGH University of Krakow], Bielcik, J. [Czech Technical University in Prague], Bielcikova, J. [Nuclear Physics Institute of the CAS; Czech Technical University in Prague], Brandenburg, J. D. [The Ohio State University], Broodo, C. [University of Houston], Cai, X. Z. [Shanghai Institute of Applied Physics], Caines, H. [Yale University], Sánchez, M. Calderón de la Barca [University of California], Cebra, D. [University of California], Ceska, J. [Czech Technical University in Prague], Chakaberia, I. [Lawrence Berkeley National Laboratory], Chaloupka, P. [Czech Technical University in Prague], Chang, Y. S. [Purdue University], Chang, Z. [Indiana University], Chatterjee, A. [National Institute of Technology Durgapur], Chen, D. [University of California], Chen, J. H. [Fudan University], Chen, Q. [Guangxi Normal University], Chen, W. [Fudan University], Chen, Z. [Shandong University], Cheng, J. [Tsinghua University], Cheng, Y. [University of California], Christie, W. [Brookhaven National Laboratory], Chu, X. [Brookhaven National Laboratory], Corey, S. [The Ohio State University], Crawford, H. J. [University of California], Csanád, M. [ELTE Eötvös Loránd University], Dale-Gau, G. [Czech Technical University in Prague], Das, A. [Czech Technical University in Prague], Lemos, D. De Souza [Brookhaven National Laboratory], Deppner, I. M. [University of Heidelberg], Deshpande, A. [State University of New York], Dhamija, A. [Panjab University], Dimri, A. [State University of New York], Dixit, P. [Fudan University], Dong, X. [Lawrence Berkeley National Laboratory], Drachenberg, J. L. [Abilene Christian University], Duckworth, E. [Kent State University], Dunlop, J. C. [Brookhaven National Laboratory], El-Feky, Y. S. [American University in Cairo], Engelage, J. [University of California], Eppley, G. [Rice University], Esumi, S. [University of Tsukuba], Evdokimov, O. [University of Illinois at Chicago], Eyser, O. [Brookhaven National Laboratory], Fan, B. [Central China Normal University], Fatemi, R. [University of Kentucky], Fazio, S. [University of Calabria & INFN-Cosenza], Feng, H. [Central China Normal University], Feng, Y. [Central China Normal University], Finch, E. [Southern Connecticut State University], Fisyak, Y. [Brookhaven National Laboratory], Flor, F. A. [Yale University], Fu, C. [Institute of Modern Physics], Fu, T. [Shandong University], Gagliardi, C. A. [Texas A&M University], Galatyuk, T. [Technische Universität Darmstadt], Gao, T. [Shandong University], Gao, Y. [Fudan University], Garcia, G. [Brookhaven National Laboratory], Geurts, F. [Rice University], Gibson, A. [Valparaiso University], Giri, A. [University of Houston], Gopal, K. [Indian Institute of Science Education and Research (IISER) Tirupati], Gou, X. [Shandong University], Grosnick, D. [Valparaiso University], Gu, A. [Huzhou University], Gu, J. [Fudan University], Gupta, A. [University of Jammu], Guryn, W. [Brookhaven National Laboratory], Hamed, A. [American University in Cairo], Hamilton, R. J. [Yale University], Han, J. [Central China Normal University], Han, X. [The Ohio State University], Harabasz, S. [Technische Universität Darmstadt], Harasty, M. D. [University of California], Harris, J. W. [Yale University], Harrison-Smith, H. [University of Kentucky], Havener, L. B. [Yale University], He, X. H. [Institute of Modern Physics]. 2026-01-08. Measurement of medium-induced acoplanarity in central Au-Au and 𝑝𝑝 collisions at $\sqrt{s_{NN}}$ = 200 GeV using direct-photon + jet and 𝜋 0 + jet correlations. https://doi.org/10.1103/k29c-d5ry
Cite the original work for its findings. Save a collection to share your selection of sources.