Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Light Fragment Yields from Central Au + Au Collisions at 11.5 A GeV/c   Inclusive double differential multiplicities of deuterons, ^3H, ^3He, and
^4He measured by E877 for 11.5 A GeV/c Au+Au collisions at the AGS are
presented. Light fragments at beam-rapidity are measured for the first time at
AGS energies. Beam rapidity deuteron and ^4He yields and transverse slope
parameters are found to be strongly dependent on impact parameter and the shape
of the deuteron spectra is not consistent with that expected for a simple
thermal distribution. The deuteron yields relative to proton yields are
analyzed in terms of a simple coalescence model. While results indicate an
increase in source size compared to collisions of lighter systems at the same
energy, they are inconsistent with a simple coalescence model reflected by a
rapidity dependence of the coalescence parameter B_d. A new approach utilizing
an expanding thermalized source combined with a coalescence code is developed
for studying deuteronformation in heavy-ion collisions. The strong dependence
of deuteron yields on collective motion implies that deuteron yields relative
to those of protons can be used for constraining source parameters.

30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs