TY  - JOUR
A1  - Jhang, Genie
A1  - Estee, Justin
A1  - Barney, Jonathan
A1  - Cerizza, Giordano
A1  - Kaneko, Masanori
A1  - Lee, Jung Woo
A1  - Lynch, William G.
A1  - Isobe, Tadaaki
A1  - Kurata-Nishimura, Mizuki
A1  - Murakami, Tetsuya
A1  - Tsang, Chun Yuen
A1  - Tsang, Betty
A1  - Wang, Rensheng
A1  - Ahn, Deuk Soon
A1  - Atar, Leyla
A1  - Aumann, Thomas
A1  - Baba, Hidetada
A1  - Boretzky, Konstanze
A1  - Brzychczyk, Janusz
A1  - Chiga, Nobuyuki
A1  - Fukuda, Naoki
A1  - Gašparić, Igor
A1  - Hong, Byungsik
A1  - Horvat, Andrea
A1  - Ieki, Kazuo
A1  - Inabe, Naohito
A1  - Kim, Y.J.
A1  - Kobayashi, Taizo
A1  - Kondo, Yosuke
A1  - Lasko, Pawel
A1  - Lee, H.S.
A1  - Leifels, Yvonne
A1  - Łukasik, Jerzy
A1  - Manfredi, Juan
A1  - McIntosh, Alan B.
A1  - Morfouace, Pierre
A1  - Nakamura, Takashi
A1  - Nakatsuka, N.
A1  - Nishimura, Shunji
A1  - Olsen, Robert
A1  - Otsu, Hideaki
A1  - Pawłowski, Piotr
A1  - Pelczar, Krzysztof
A1  - Rossi, Dominic M.
A1  - Sakurai, Hiroyoshi
A1  - Santamaria, Clementine
A1  - Sato, Hiromi
A1  - Scheit, Heiko
A1  - Shane, Rebecca
A1  - Shimizu, Yohei
A1  - Simon, Haik
A1  - Snoch, Aleksandra
A1  - Sochocka, Anna
A1  - Sosin, Zbigniew
A1  - Sumikama, Toshiyuki
A1  - Suzuki, Hiroshi
A1  - Suzuki, Daisuke
A1  - Takeda, Hiroshi
A1  - Tangwancharoen, Suwat
A1  - Törnqvist, Hans Toshihide
A1  - Togano, Yasuhiro
A1  - Xiao, Zhi-Gang
A1  - Yennello, Sherry J.
A1  - Yurkon, John
A1  - Zhang, Youhong
A1  - Colonna, Maria
A1  - Cozma, Dan
A1  - Danielewicz, Paweł
A1  - Elfner, Hannah
A1  - Ikeno, Natsumi
A1  - Ko, Che Ming
A1  - Mohs, Justin
A1  - Oliinychenko, Dmytro
A1  - Ono, Akira
A1  - Su, Jun
A1  - Jia Wang, Yong
A1  - Wolter, Hermann
A1  - Xu, Jun
A1  - Zhang, Ying-Xun
A1  - Zhang, Zhen
T1  - Symmetry energy investigation with pion production from Sn+Sn systems
T2  - Physics Letters B
N2  - In the past two decades, pions created in the high density regions of heavy ion collisions have been predicted to be sensitive at high densities to the symmetry energy term in the nuclear equation of state, a property that is key to our understanding of neutron stars. In a new experiment designed to study the symmetry energy, the multiplicities of negatively and positively charged pions have been measured with high accuracy for central 132Sn+124Sn, 112Sn+124Sn, and 108Sn+112Sn collisions at E/A = 270 MeV with the SπRIT Time Projection Chamber. While individual pion multiplicities are measured to 4% accuracy, those of the charged pion multiplicity ratios are measured to 2% accuracy. We compare these data to predictions from seven major transport models. The calculations reproduce qualitatively the dependence of the multiplicities and their ratios on the total neutron and proton number in the colliding systems. However, the predictions of the transport models from different codes differ too much to allow extraction of reliable constraints on the symmetry energy from the data. This finding may explain previous contradictory conclusions on symmetry energy constraints obtained from pion data in Au+Au system. These new results call for still better understanding of the differences among transport codes, and new observables that are more sensitive to the density dependence of the symmetry energy.
Y1  - 2020
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/70250
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-702506
SN  - 1873-2445
SN  - 0370-2693
VL  - 813.2021
IS  - 136016
PB  - Elsevier
CY  - Amsterdam
ER  -