Probing the Symmetry Energy with the Spectral Pion Ratio

Estee, J.; Lynch, W. G.; Tsang, C. Y.; Barney, J.; Jhang, G.; Tsang, M. B.; Wang, R.; Kaneko, M.; Lee, J. W.; Isobe, T.; Kurata-Nishimura, M.; Murakami, T.; Ahn, D. S.; Atar, L.; Aumann, T.; Baba, H.; Boretzky, K.; Brzychczyk, J.; Cerizza, G.; Chiga, N.; Fukuda, N.; Gasparic, I; Hong, B.; Horvat, A.; Ieki, K.; Inabe, N.; Kim, Y. J.; Kobayashi, T.; Kondo, Y.; Lasko, P.; Lee, H. S.; Leifels, Y.; Lukasik, J.; Manfredi, J.; McIntosh, A. B.; Morfouace, P.; Nakamura, T.; Nakatsuka, N.; Nishimura, S.; Otsu, H.; Pawlowski, P.; Pelczar, K.; Rossi, D.; Sakurai, H.; Santamaria, C.; Sato, H.; Scheit, H.; Shane, R.; Shimizu, Y.; Simon, H.; Snoch, A.; Sochocka, A.; Sumikama, T.; Suzuki, H.; Suzuki, D.; Takeda, H.; Tangwancharoen, S.; Toernqvist, H.; Togano, Y.; Xiao, Z. G.; Yennello, S. J.; Zhang, Y.; Cozma, M. D.

doi:10.1103/PhysRevLett.126.162701

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Probing the Symmetry Energy with the Spectral Pion Ratio

Estee, J.;
Lynch, W. G.;
Tsang, C. Y.;
Barney, J.;
Jhang, G.;
... Hong, B.;
외 57명

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129

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142

초록

Many neutron star properties, such as the proton fraction, reflect the symmetry energy contributions to the equation of state that dominate when neutron and proton densities differ strongly. To constrain these contributions at suprasaturation densities, we measure the spectra of charged pions produced by colliding rare isotope tin (Sn) beams with isotopically enriched Sn targets. Using ratios of the charged pion spectra measured at high transverse momenta, we deduce the slope of the symmetry energy to be 42 < L < 117 MeV. This value is slightly lower but consistent with the L values deduced from a recent measurement of the neutron skin thickness of Pb-208.

키워드

EQUATION-OF-STATE; PARAMETER; GW170817; SYSTEM; MATTER

제목: Probing the Symmetry Energy with the Spectral Pion Ratio

저자: Estee, J.; Lynch, W. G.; Tsang, C. Y.; Barney, J.; Jhang, G.; Tsang, M. B.; Wang, R.; Kaneko, M.; Lee, J. W.; Isobe, T.; Kurata-Nishimura, M.; Murakami, T.; Ahn, D. S.; Atar, L.; Aumann, T.; Baba, H.; Boretzky, K.; Brzychczyk, J.; Cerizza, G.; Chiga, N.; Fukuda, N.; Gasparic, I; Hong, B.; Horvat, A.; Ieki, K.; Inabe, N.; Kim, Y. J.; Kobayashi, T.; Kondo, Y.; Lasko, P.; Lee, H. S.; Leifels, Y.; Lukasik, J.; Manfredi, J.; McIntosh, A. B.; Morfouace, P.; Nakamura, T.; Nakatsuka, N.; Nishimura, S.; Otsu, H.; Pawlowski, P.; Pelczar, K.; Rossi, D.; Sakurai, H.; Santamaria, C.; Sato, H.; Scheit, H.; Shane, R.; Shimizu, Y.; Simon, H.; Snoch, A.; Sochocka, A.; Sumikama, T.; Suzuki, H.; Suzuki, D.; Takeda, H.; Tangwancharoen, S.; Toernqvist, H.; Togano, Y.; Xiao, Z. G.; Yennello, S. J.; Zhang, Y.; Cozma, M. D.

DOI: 10.1103/PhysRevLett.126.162701

발행일: 2021-04-19

유형: Article

저널명: Physical Review Letters

권: 126

호: 16