Light (anti-)nuclei and (anti-)hypertriton production in pp collisions at $$\sqrt{s} =0.90, 2.76$$
- PDF / 650,000 Bytes
- 9 Pages / 439.37 x 666.142 pts Page_size
- 75 Downloads / 154 Views
Light (anti-)nuclei √ and (anti-)hypertriton production in pp collisions at s = 0.90, 2.76 and 7 TeV Nserdin A. Ragab1,2 , Zhi-Lei She1,2 , Gang Chen1,a 1 School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China 2 Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China
Received: 26 May 2020 / Accepted: 29 August 2020 © Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Production of light (anti-)nuclei and√ (anti-)hypertriton within midrapidity (|y| < 0.5) and pT < 3.0 GeV/c in pp interactions at s = 0.90, 2.76 and 7 TeV is investigated by the dynamically constrained phase space coalescence model, combined with PACIAE model. The ALICE data for yields, ratios, as well as transverse momentum distributions of d and d are well reproduced by the model simulations, meanwhile the three basic characters of 3 He, 3 He, 3 H, and 3 H are also predicted. Besides, we found the yields of light (anti-)nuclei produced are dependent upon their mass number A, namely, their yields sharply decrease with the increasing of A. The strangeness population factor s3 = (3 H/3 He)/(/p) is found to be about 0.7–0.8, and is comparable with the available experimental results.
1 Introduction The investigation of anti-nuclei is a hot and frontier topic in particle and nuclear physics, cosmology, and astrophysics. Since plentiful nuclei and anti-nuclei can be produced in high energy accelerator experiment, it exactly provides a chance to study light (anti-)nuclei production [1]. In the last decades, production of antimatter has been a focus in several collision systems under different energies. In large systems, the light anti-nuclei (e.g., d, 3 He, even 4 He) and anti-hypertrition (3 H) have been successfully measured, such as in Au-Au collisions [2–5] √ √ within s N N = 7.7 GeV to 200 GeV and in Pb–Pb interactions [6–9] at s N N = 2.76 TeV, respectively. For the little systems, ALICE Collaboration √ has also published papers on light anti-nuclei production in pp interactions [6,7,10] at s = 0.90, 2.76, and 7 TeV. Theoretically, one can normally select several numerical models(e.g., a transport model) to predict the production of (anti-)nucleons and (anti-)hyperons. Then, light (anti-)nuclei and (anti-)hypernuclei production are computed with a statistical method [11] or a certain phase-space coalescence model [12–15]. As examples some researches applied the selected coalescence model to combine a multiphase transport (AMPT) model [16] or the blast-wave approach [17–19], to study light (anti-)nuclei production in high energy nuclear-nuclear collisions. Besides those efforts, the DCPC model [20,21] was created to investigate production of light (anti-)nuclei [22,23] in high energy pp collisions [24] and nucleus-nucleus (Pb–
a e-mail: [email protected] (corresponding author)
0123456789().: V,-vol
123
736
Page 2 of 9
Eur. Phys. J. Plus
(2020) 135:736
Pb [25], and Au-Au [26], Cu-Cu [27]) collisions, in which the fina
Data Loading...
