# Measurement of the Cross-Section for W Boson Production in Association with b-Jets in Proton-Proton Collisions at $$\sqrt s = 7$$ TeV at the LHC using the ATLAS detector

 Title: Measurement of the Cross-Section for W Boson Production in Association with b-Jets in Proton-Proton Collisions at $$\sqrt s = 7$$ TeV at the LHC using the ATLAS detector Author: Zevi Della Porta, Giovanni Citation: Zevi Della Porta, Giovanni. 2013. Measurement of the Cross-Section for W Boson Production in Association with b-Jets in Proton-Proton Collisions at $$\sqrt s = 7$$ TeV at the LHC using the ATLAS detector. Doctoral dissertation, Harvard University. Full Text & Related Files: ZeviDellaPorta_gsas.harvard_0084L_11031.pdf (7.757Mb; PDF) Abstract: This dissertation presents a measurement of the W+b-jets $$(pp → W + b(\bar{b}) + X)$$ production cross-section in proton–proton collisions at a center-of-mass energy of 7 TeV at the LHC. The results are based on data corresponding to an integrated luminosity of $$4.6 fb^{−1}$$, collected with the ATLAS detector. The measurement probes the QCD sector of the Standard Model at high energy, in a region where b-quark mass and double parton scattering play an important role. In addition, the measurement is relevant for searches for physics beyond the Standard Model in final states with a W boson and b-jets. The measurement relies on the leptonic decay modes of the W, and on the iden- tification of b-jets. The backgrounds to the W+b-jets process are estimated using Monte Carlo simulation and data-driven techniques. Cross-sections, corrected for all known detector effects and quoted in a limited kinematic range, are presented as a function of jet multiplicity and of the transverse momentum of the leading b-jet for both the muon and electron decay modes of the W boson. Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10974702 Downloads of this work: