Regimes of the Pomeron and its intrinsic entropy

Abstract

We suggest that the perturbative and non-perturbative descriptions of the Pomeron can be viewed as complementary descriptions of different phases in the Pomeron phase diagram, with a phase boundary where the proper description of the produced systems are "string balls". Their intrinsic entropy is calculated and turned out to be the same, as the recently reported perturbative entanglement entropy. The distribution of large multiplicities stemming from the string balls is also wide, with its moments close to those reported for hadrons in pp collisions at the LHC. At low-x, the quantum string is so entangled that sufficiently weak string self-attraction can cause it to turn to a string ball dual to a black hole. We suggest that low-x saturation occurs when the density of wee-strings reaches the Bekenstein bound, with a proton size that freezes with increasing rapidity. Some of these observations maybe checked at the future eIC.

Entanglement in Regge scattering using the AdS/CFT correspondence

“…in agreement with the initial observation in [8,26]. The thermal-like entropy (28) per unit rapidity χ is fixed by the Pomeron intercept α P (0).…”

“…The thermal-like entropy (28) per unit rapidity χ is fixed by the Pomeron intercept α P (0). It is at the origin of the rise of the scattering cross section and ultimatly the multiplicities in high energy scattering as discussed in [8,26].…”

“…To exponential accuracy, (18) happens to be exactly the tachyon-mode contribution to the closed string propagator subject to the twisted boundary conditions (13). Specifically, in the Pomeron channel the exact tachyon contribution is [18,26]…”

Dynamics of entanglement in expanding quantum fields

“…We note that in the context of high energy hadron and heavy ion collisions, entanglement and entropy related ideas were discussed some time ago [43][44][45][46][47] as well as more recently [48][49][50][51][52]. Besides high energy collider physics, the dynamics of entanglement for quantum field theoretic models is also of relevance in other contexts.…”

QCD thermalization: Ab initio approaches and interdisciplinary connections

“…Another is the related topic of hydrodynamic fluctuations [70,71]. Other noteworthy omissions in our presentation include the discussion of holographic deep inelastic scattering [72][73][74], holographic hard probes [75][76][77][78][79] and features of linear response theory [80][81][82]. Some aspects of holographic approaches that we omit or treat only partially were discussed in [48,[83][84][85][86].…”