001259790 001__ 1259790
001259790 003__ SzGeCERN
001259790 005__ 20230314204451.0
001259790 0247_ $$2DOI$$a10.1140/epjc/s10052-010-1417-0
001259790 0248_ $$aoai:cds.cern.ch:1259790$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
001259790 035__ $$9arXiv$$aoai:arXiv.org:1004.2597
001259790 035__ $$9Inspire$$a852041
001259790 037__ $$9arXiv$$aarXiv:1004.2597$$chep-ex
001259790 037__ $$aCERN-PH-EP-2010-007
001259790 037__ $$aTPJU-1-2010
001259790 041__ $$aeng
001259790 084__ $$2CERN Library$$aPH-EP-2010-007
001259790 088__ $$aCERN-PH-EP-2010-007
001259790 088__ $$aTPJU-1-2010
001259790 100__ $$aKrasny, M.W.$$uParis U., VI-VII
001259790 245__ $$a$\Delta M_{W}\leq 10 MeV/c^2$ at the LHC: a forlorn hope?
001259790 260__ $$c2010
001259790 269__ $$c16 Apr 2010
001259790 300__ $$a26 p
001259790 500__ $$aComments: 26 pages, 10 figures, to be submitted to European Physical Journal C
001259790 500__ $$9arXiv$$a26 pages, 10 figures, to be submitted to European Physical Journal C
001259790 520__ $$aAt the LHC, the measurement of the W mass with a precision of $ O(10) MeV/c^2$ is both mandatory and difficult. In the analysis strategies proposed so far, shortcuts have been made that are justified for proton-antiproton collisions at the Tevatron, but not for proton-proton collisions at the LHC. The root of the problem lies in the inadequate knowledge of parton density functions of the proton. It is argued that in order to reach a $10 MeV/c^2$ precision for the W mass, more precise parton density functions of the proton are needed, and an LHC-specific analysis strategy ought to be pursued. Proposals are made on both issues.
001259790 520__ $$9arXiv$$aAt the LHC, the measurement of the W mass with a precision of \cal{O}(10) MeV/c^2 is both mandatory and difficult. In the analysis strategies proposed so far, shortcuts have been made that are justified for proton-antiproton collisions at the Tevatron, but not for proton-proton collisions at the LHC. The root of the problem lies in the inadequate knowledge of parton density functions of the proton. It is argued that in order to reach a 10 MeV/c^2 precision for the W mass, more precise parton density functions of the proton are needed, and an LHC-specific analysis strategy ought to be pursued. Proposals are made on both issues.
001259790 540__ $$3Preprint$$aCC-BY-3.0
001259790 542__ $$3Preprint$$dCERN$$g2010
001259790 595__ $$aCERN-PH-EP
001259790 595__ $$aLANL EDS
001259790 595__ $$aOA
001259790 65017 $$2arXiv$$aParticle Physics - Experiment
001259790 690C_ $$aARTICLE
001259790 690C_ $$aCERN
001259790 693__ $$aCERN LHC
001259790 695__ $$9LANL EDS$$ahep-ex
001259790 700__ $$aDydak, F.$$uCERN
001259790 700__ $$aFayette, F.$$uParis U., VI-VII
001259790 700__ $$aPlaczek, W.$$uJagiellonian U.
001259790 700__ $$aSiodmok, A.$$uParis U., VI-VII$$uJagiellonian U.
001259790 710__ $$5PH-EP
001259790 773__ $$c379-397$$pEur. Phys. J. C$$v69$$y2010
001259790 8564_ $$uhttp://arxiv.org/pdf/1004.2597.pdf$$yPreprint
001259790 8564_ $$81008643$$s2178173$$uhttps://cds.cern.ch/record/1259790/files/arXiv:1004.2597.pdf
001259790 8564_ $$81008655$$s21065$$uhttps://cds.cern.ch/record/1259790/files/P_t-of-W-at-the-LHC.png$$y00000 Simulation of the $p_{\rm T}$ spectrum of charged leptons from the decay ${\rm W} \rightarrow {\rm l}\nu$; the full line is generated with zero $p_{\rm T}$ of the W's, the broken line represents the effect of a non-zero $p_{\rm T}$ as predicted by PYTHIA.
001259790 8564_ $$81008651$$s33863$$uhttps://cds.cern.ch/record/1259790/files/nb_pxp_up_wp_xx_phys01_pdf10150_mw00_etal_VS_pxp_up_wm_xx_phys01_pdf10150_mw00_etal.png$$y00006 Pseudorapidity $\eta$ and the transverse momentum \pT\ of charged leptons from the decay of \Wpm 's, in \ppbar\ collisions (left panels) and in \pp\ collisons (right panels).
001259790 8564_ $$81008638$$s34980$$uhttps://cds.cern.ch/record/1259790/files/nb_pxp_up_wp_xx_phys01_pdf10150_mw00_yW_VS_pxp_up_wm_xx_phys01_pdf10150_mw00_yW.png$$y00002 Rapidity $y$ and the transverse momentum \pT\ of \Wpm 's, in \ppbar\ collisions (left panels) and in \pp\ collisions (right panels).
001259790 8564_ $$81008656$$s36390$$uhttps://cds.cern.ch/record/1259790/files/nb_pxp_up_wp_xx_phys01_pdf10150_mw00_pTl_VS_pxp_up_wm_xx_phys01_pdf10150_mw00_pTl.png$$y00008 Pseudorapidity $\eta$ and the transverse momentum \pT\ of charged leptons from the decay of \Wpm 's, in \ppbar\ collisions (left panels) and in \pp\ collisons (right panels).
001259790 8564_ $$81008647$$s36566$$uhttps://cds.cern.ch/record/1259790/files/nb_ppb_up_wp_xx_phys01_pdf10150_mw00_etal_VS_ppb_up_wm_xx_phys01_pdf10150_mw00_etal.png$$y00005 Pseudorapidity $\eta$ and the transverse momentum \pT\ of charged leptons from the decay of \Wpm 's, in \ppbar\ collisions (left panels) and in \pp\ collisons (right panels).
001259790 8564_ $$81008640$$s37253$$uhttps://cds.cern.ch/record/1259790/files/PDFS.png$$y00014 The MSTW--2008 proton PDFs at $Q^2 = 10$~GeV$^2$/{\it c}$^4$; the widths of the bands characterize the estimated uncertainty.
001259790 8564_ $$81008639$$s38099$$uhttps://cds.cern.ch/record/1259790/files/nb_ppb_up_wp_xx_phys01_pdf10150_mw00_yW_VS_ppb_up_wm_xx_phys01_pdf10150_mw00_yW.png$$y00001 Rapidity $y$ and the transverse momentum \pT\ of \Wpm 's, in \ppbar\ collisions (left panels) and in \pp\ collisions (right panels).
001259790 8564_ $$81008645$$s38296$$uhttps://cds.cern.ch/record/1259790/files/plot3a.png$$y00009 The effect of the valence quarks on the \pTl\ spectra of \Wp\ (left panel) and \Wm\ (right panel) in \pp\ collisions at the LHC.
001259790 8564_ $$81008658$$s38896$$uhttps://cds.cern.ch/record/1259790/files/plot2b.png$$y00012 The effects of s and c quarks on the \pTl\ spectra of \Wp\ (left panel) and \Wm\ (right panel) in \pp\ collisions at the LHC.
001259790 8564_ $$81008649$$s38974$$uhttps://cds.cern.ch/record/1259790/files/plot2a.png$$y00013 The effects of s and c quarks on the \pTl\ spectra of \Wp\ (left panel) and \Wm\ (right panel) in \pp\ collisions at the LHC.
001259790 8564_ $$81008644$$s39716$$uhttps://cds.cern.ch/record/1259790/files/plot3b.png$$y00010 The effect of the valence quarks on the \pTl\ spectra of \Wp\ (left panel) and \Wm\ (right panel) in \pp\ collisions at the LHC.
001259790 8564_ $$81008659$$s40551$$uhttps://cds.cern.ch/record/1259790/files/nloratioupvalence.png$$y00015 Comparison of the CTEQ6.6 and MSTW2008 (NLO) PDFs of u$_{\rm v}$, d$_{\rm v}$, u, d and s quarks, and of gluons.
001259790 8564_ $$81008650$$s41324$$uhttps://cds.cern.ch/record/1259790/files/nloratiogluon.png$$y00020 Comparison of the CTEQ6.6 and MSTW2008 (NLO) PDFs of u$_{\rm v}$, d$_{\rm v}$, u, d and s quarks, and of gluons.
001259790 8564_ $$81008661$$s42463$$uhttps://cds.cern.ch/record/1259790/files/nloratioup.png$$y00017 Comparison of the CTEQ6.6 and MSTW2008 (NLO) PDFs of u$_{\rm v}$, d$_{\rm v}$, u, d and s quarks, and of gluons.
001259790 8564_ $$81008641$$s42889$$uhttps://cds.cern.ch/record/1259790/files/nb_pxp_up_wp_xx_phys01_pdf10150_mw00_pTW_VS_pxp_up_wm_xx_phys01_pdf10150_mw00_pTW.png$$y00004 Rapidity $y$ and the transverse momentum \pT\ of \Wpm 's, in \ppbar\ collisions (left panels) and in \pp\ collisions (right panels).
001259790 8564_ $$81008660$$s42942$$uhttps://cds.cern.ch/record/1259790/files/nb_ppb_up_wp_xx_phys01_pdf10150_mw00_pTl_VS_ppb_up_wm_xx_phys01_pdf10150_mw00_pTl.png$$y00007 Pseudorapidity $\eta$ and the transverse momentum \pT\ of charged leptons from the decay of \Wpm 's, in \ppbar\ collisions (left panels) and in \pp\ collisons (right panels).
001259790 8564_ $$81008642$$s43838$$uhttps://cds.cern.ch/record/1259790/files/nloratiodown.png$$y00018 Comparison of the CTEQ6.6 and MSTW2008 (NLO) PDFs of u$_{\rm v}$, d$_{\rm v}$, u, d and s quarks, and of gluons.
001259790 8564_ $$81008653$$s44315$$uhttps://cds.cern.ch/record/1259790/files/nloratiostrange.png$$y00019 Comparison of the CTEQ6.6 and MSTW2008 (NLO) PDFs of u$_{\rm v}$, d$_{\rm v}$, u, d and s quarks, and of gluons.
001259790 8564_ $$81008657$$s44926$$uhttps://cds.cern.ch/record/1259790/files/nb_ppb_up_wp_xx_phys01_pdf10150_mw00_pTW_VS_ppb_up_wm_xx_phys01_pdf10150_mw00_pTW.png$$y00003 Rapidity $y$ and the transverse momentum \pT\ of \Wpm 's, in \ppbar\ collisions (left panels) and in \pp\ collisions (right panels).
001259790 8564_ $$81008654$$s46265$$uhttps://cds.cern.ch/record/1259790/files/nloratiodownvalence.png$$y00016 Comparison of the CTEQ6.6 and MSTW2008 (NLO) PDFs of u$_{\rm v}$, d$_{\rm v}$, u, d and s quarks, and of gluons.
001259790 8564_ $$81008648$$s48758$$uhttps://cds.cern.ch/record/1259790/files/f2beauty.png$$y00022 The measured PDF of the b quark, and the MSTW2008 fit, at different values of $Q^2$.
001259790 8564_ $$81008652$$s67065$$uhttps://cds.cern.ch/record/1259790/files/f2charm.png$$y00021 The measured PDF of the c quark, and the MSTW2008 fit, at different values of $Q^2$.
001259790 8564_ $$81008646$$s72119$$uhttps://cds.cern.ch/record/1259790/files/Stirling_energydependence.png$$y00011 Contributions of different quark--antiquark annihilations to \Wpm\ (left panel) and Z (right panel) production, as a function of the beam energy.
001259790 916__ $$sn$$w201015$$ya2010
001259790 960__ $$a13
001259790 961__ $$c20110316$$h1209$$lCER01$$x20100416
001259790 963__ $$aPUBLIC
001259790 970__ $$a002892619CER
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