Wounded quark emission function at the top RHIC energy

Abstract

We note that wounded quark (diquark) properties can be naturally inferred from a differential proton-proton elastic cross section, as shown in Refs. [13][14][15][16]. 2 In the wounded nucleon model a nucleon from a deuteron populates particles independently on the number of collisions, whereas in the wounded quark model the number of particles depends on the number of wounded quarks, which clearly depends on the number of collisions.

Wounded nucleon, quark, and quark-diquark emission functions versus experimental results from the BNL Relativistic Heavy Ion Collider at sNN=200 GeV

“…We note that our predictions based on the WQM, published in Ref. [12], have already been successfully verified by PHENIX, see Ref. [21].…”

“…For collisions at √ s N N = 200 GeV we took the corresponding nucleon-nucleon cross-section of σ nn = 41 mb [25]. For the WQM we determined σ qq using the trial and error method [12]. We found the value of σ qq = 6.65 mb, which satisfies σ nn = ´2π 0 dϕ ´+∞ 0 ds sP (s), where P (s) is a probability for the inelastic collision of two nucleons with the transverse distance s. In the WQDM there are three possible types of collisions of constituents: quark-quark, quark-diquark and diquark-diquark.…”

“…The wounded quark model [2] is similar but constituent quark-quark collisions are considered. This model was studied recently in various contexts with rather interesting results [3][4][5][6][7][8][9][10][11][12][13]. In the wounded quark-diquark model [14], a nucleon is assumed to consist of a quark and a diquark.…”

“…In our previous work [12], we investigated the wounded quark emission function F (η) extracted from d+ 197 Au collisions at √ s N N = 200 GeV measured by the PHOBOS collaboration at the Relativistic Heavy Ion Collider (RHIC) [20]. This function is defined as the pseudorapidity particle multiplicity distribution from one wounded source.…”