Seminarium "Teoria cząstek elementarnych i kosmologia"

I will explain the estimate [1] that collisions of gluon strings can cause azimuthal variation on the order of one to ten percent in the multiplicity and elliptic flow in peripheral proton-proton scattering at LHC. Since according to the estimate the strings are formed inside photons, measurements of the string effects at LHC or other colliders could possibly tell us a bit about how photons are made. [1] Glazek,Brodsky,Goldhaber,Brown,PRD 97,114021('18).