Measurements of the photon structure function at LEP

Abstract

Abstract. In this contribution we discuss recent measurements by the LEP experiments on photon structure functions.

Photon structure studied at an electron ion collider

“…In the past decades, experimental progress to constrain the photon QCD structure has come mainly from e + e − -collider experiments [7][8][9] and to some extent from the HERA experiments [10,11]. The classical way to investigate the structure of the photon at e + e − colliders is to measure the following process:…”

Fluctuation theorems for quantum master equations

“…Quantum Jarzynski relations have been investigated in [20,21,22,23]. Quantum fluctuation theorems have been developed only in a few restricted situations [24,25,26,27]. A quantum exchange fluctuation theorem has also been considered in [28].…”

Impact of polarized e−and e+beams at a future Linear Collider and a Z-factory

“…Higher gradients up to 59 MV/m have alrea dy been achieved in single cells with so-called 're-entrant' cavities, developed by Cornell and KEK. Concerning the industrial cavity production, an averag e of 36 MV/m in nine-cell cavities has been achieved [9]. b) For achieving higher energies of √ s in the multi-TeV range a normalconducting two-beam acceleration concept is discussed, the Compact Linear Collider (CLIC).…”

“…A conceptual design report is foreseen for 2010, where the key feasibility issues of the CLIC technology are foreseen to be demonstrated as well as the preliminary performance and a first cost estimation. A fruitful ILC/CLIC collaboration has been started to address common R&D issues in the civil engineering & conventional facilities, beam delivery system, beam dynamics and detectors, more details see [9]. Comparing the potential of the two linear collider technologies several technical issues have to be taken into account that may have impact on the physics potential.…”

“…Severe impact on the achievable precision due to pile-up of soft hadronic interactions can arise unless unprecedented time-stamping capability both for charged and neutral particles can be implemented into the CLIC detectors.Detailed simulations will be needed for achieving conclusive results concerning the physics potential of the different desig ns. Therefore a staged approach between the different design may be beneficial [9].…”