Physics revealed at intermediatep_T

Abstract

A review is given on the subject of hadron production at intermediate pT in heavy-ion collisions. The underlying dynamical processes are inferred from interpreting the data in the framework of recombination. Ridge formation with or without triggers is found to play an important role in nearly all observables in that pT region. Correlation data would be hard to interpret without taking ridges into account. The semi-hard partons that create the ridges may even be able to drive elliptic flow without fast thermalization.

Relationship between the azimuthal dependencies of nuclear modification factor and ridge yield

“…Theoretically, large baryon/meson ratio has been a signature of the recombination model [10,11]. Since the same hadronization mechanism applies to both inclusive and ridge production, we expect that R AA for proton will have the same characteristics as that for pion.…”

“…Now, with the same ρ R 2 (φ 1 , φ 2 ) we can calculate the ridge yield Y R (φ 1 ) as given in Eq. (10), where the integration…”

“…The present paper is focused exclusively on p T < 2 GeV/c. It is conventionally thought that at such low p T only soft physics is involved, a view that has been regarded as being too simplistic on account of the semihard scattering that can enhance the soft thermal partons [10,11]. Whether or not trigger particles are used to select a subset of events, semihard partons are pervasive and generate ridges that affect both singleparticle and dihadron distributions.…”

Two Introductory Lectures on High-Energy QCD and Heavy-Ion Collisions

“…Ours is the only dynamical model with this feature-for other models, see Ref. [93]. The particles produced in a flux tube are isotropic locally in the rest frame but are collimated in azimuthal angle when boosted by transverse flow [94].…”

Pressure dependence of elastic properties of low-silica calcium alumino-silicate glasses

“…Calcium aluminate oxide glasses have long been proposed as infrared window materials [1][2][3] and are now receiving increased attention for use as potential low-loss fiber optics materials [4][5][6][7][8]. The structure of calcium alumino-silicate (CAS) glasses was studied by many authors using infrared reflectivity and Raman scattering techniques [9][10][11][12][13].…”