Luminosity monitors at the LHC
نویسنده
چکیده
We study the theoretical accuracy of various methods that have been proposed to measure the luminosity of the LHC pp collider, as well as for Run II of the Tevatron pp̄ collider. In particular we consider methods based on (i) the total and forward elastic data, (ii) lepton-pair production and (iii) W and Z production.
منابع مشابه
مطالعه تولید منحصر بفرد جفت پایونهای مثبت و منفی در برخوردهای پروتون-پروتون با مرکز جرم 7 ترا الکترون ولت
The exclusive production of charged pions, are reported in the proton-proton collisions, where the π+π- pair is emitted at the central rapidity, y, and the scattered protons stay intact (p) without detection. This measurement is performed with the CMS detector at the LHC, using a data sample corresponding to an integrated luminosity of 450 μb-1 collected at a center-of-mass energy of 7 TeV. Th...
متن کاملLhc Luminosity and Energy Upgrade*
LHC upgrade studies are ongoing as part of the EU CARE-HHH and of the US-LARP programmes. The aim is a ten-fold increase of the LHC luminosity by the middle of next decade, a possible upgrade of the injector complex to inject at 1 TeV and, at a later stage, to raise the collider energy. The motivations for the LHC upgrade are discussed. An overview of beam dynamics and technological challenges ...
متن کاملScenarios for the LHC Upgrade
The projected lifetime of the LHC low-beta quadrupoles, the evolution of the statistical error halving time, and the physics potential all call for an LHC luminosity upgrade by the middle of the coming decade. In the framework of the CARE-HHH network three principal scenarios have been developed for increasing the LHC peak luminosity by more than a factor of 10, to values above 10 cm−2s−1. All ...
متن کاملTowards a Precise Parton Luminosity Determination at the CERN LHC
A new approach to determine the LHC luminosity is investigated. Instead of employing the proton–proton luminosity measurement, we suggest to measure directly the parton– parton luminosity. It is shown that the electron and muon pseudorapidity distributions, originating from the decay of W, W and Z bosons produced at 14 TeV pp collisions (LHC), constrain the x distributions of sea and valence qu...
متن کاملPrecision luminosity measurement at LHC using two - photon production of μ + μ − pairs
The application of the two-photon process pp → pp+μμ for the luminosity measurements at LHC with the ATLAS detector is considered. The expected accuracy of the absolute offline luminosity determination is 1 ÷ 2 % for the luminosity range of 10 ÷10 cm s. The preliminary cross section estimates done for LHCb promise the same level of the luminosity measurement accuracy at L = 2 · 10 cm s.
متن کامل