Description of the evolution of mixed-symmetry states in the N = 78 isotonic chain with IBM2

Abstract

Description of the evolution of mixed-symmetry states in theN =78 isotonic chain with IBM2 * ZHANG Da-Li( ) 1;1) YUAN Shu-Qing( ) 2 DING Bin-Gang( ) 1

Squeezed back-to-back correlations of bosons with nonzero widths in relativistic heavy-ion collisions

“…1(a) and 1(b), we see that the SBBC functions of φφ with respect to mass are much wider than those of D 0D0 . This is because the SBBC function becomes wide with decreasing boson mass [6,32,33]. We also see that the influence of Γ on the SBBC function of φφ is small.…”

“…Because of the presence of a charm or strange quark, which is believed to experience the entire evolution of the quark-gluon plasma (QGP) created in relativistic heavy-ion collisions, the analyses of experimental data of D and φ mesons have recently attracted great interest . However, the bosons with large masses have strong SBBC [6,[31][32][33]. The study of the heavy-meson SBBC is meaningful in relativistic heavy-ion collisions.…”

Squeezed back-to-back correlation between bosons and antibosons with different in-medium masses in high-energy heavy-ion collisions

“…We first consider a simple case, namely a rest particleemitting source with a fixed freeze-out temperature T f , a Gaussian spatial distribution [e −r 2 /2R 2 /( √ 2πR) 3 ], and a temporal distribution of exponential decay [θ(t − t 0 )e −(t−t0)/∆t /∆t] [2,3,5]. In this case, the SBBC function of the boson-antiboson emitted from the source with momenta p 1 and p 2 , and under the condition |p 1 | = |p 2 | = |p|, can be given analytically by [24] C(p 1 ,…”

“…The dependence of SBBC on particle momentum is complicated for the hydrodynamic sources with fluctuating initial conditions. The more serious oscillations of single-event SBBC functions at higher momentum [4] may lead to a lower SBBC function after being averaged over events [7,24], although the intercept of the SBBC function C(p, −p) increases with increasing particle momentum [1][2][3][4][5][6][7][8][9]. It can be seen that the widths of the SBBC functions C(∆φ) for higher momentum are narrower than those for lower momentum, which is similar to that for the simple source in Fig.…”

“…In previous studies of the SBBC, the mass shifts of a boson and antiboson are taken to be the same [1][2][3][4][5][6][7][8][9]. More generally, the interactions of a boson and antiboson in a medium are different, especially in a medium with a finite baryon chemical potential [10][11][12][13][14][15].…”