The Energy Momentum Tensor associated with Hard Parton production in Finite Time

International Workshop on Discovery Physics at the LHC

Meiring, Ben^1 ; Horowitz, W.A.^1

Department of Physics, University of Cape Town, Lovers Walk St, Cape Town, South Africa^1

关键词: Conditional expectation;    Energy-momentum tensor;    Heavy ion physics;    High-energy collisions;    Initial conditions;    Jet productions;    Leading orders;    Scalar field theory;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/623/1/012019/pdf
DOI  :  10.1088/1742-6596/623/1/012019

来源: IOP

【 摘 要 】

We use the Schwinger-Keldysh finite-time formalism applied to an interacting scalar field theory to derive perturbative expressions detailing the system which exists during the initial stages of a high energy collision. Further, we define the QFT conditional expectation value in an effort to describe the initial conditions associated with jet production in heavy ion physics. In this paper we calculate 〈φ〉 (x) for a scalar Yukawa model, demonstrate the finiteness of the energy momentum tensor for λφ4to leading order, and derive an expression for the conditional expectation value of operators to aid in the description jet-like behaviour in interacting theories.