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Using Forward-Backward Drell-Yan Asymmetry in PDF Determinations
/ Fiaschi, Juri (Munster U., ITP) ; Accomando, Elena (Southampton U.) ; Hautmann, Francesco (Oxford U. ; CERN) ; Moretti, Stefano (Southampton U.)
/xFitter developer’s team
We study the impact of the inclusion of Neutral Current (NC) DY data from LHC mapped in the Forward-Backward Asymmetry ($A_{\rm FB}$) observable on PDF uncertainties, using the open source platform \texttt{xFitter}. We find that $A_{\rm FB}$ enables new PDF sensitivity at current and future luminosity stages of LHC..
arXiv:1906.11793; MS-TP-19-16; CERN-TH-2019-100.-
SISSA, 2019-07-20 - 6 p.
- Published in : PoS DIS2019 (2019) 012
Fulltext: 1906.11793 - PDF; PoS(DIS2019)012 - PDF;
In : The XXVII International Workshop on Deep Inelastic Scattering and Related Subjects, Turin, Italy, 8 - 12 Apr 2019, pp.012
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2.
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PDF Profiling Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production
/ Accomando, Elena (Southampton U. ; Rutherford) ; Fiaschi, Juri (Munster U., ITP ; Southampton U. ; Rutherford) ; Hautmann, Francesco (Rutherford ; Antwerp U. ; Oxford U., Theor. Phys. ; U. Basque Country, Leioa ; CERN) ; Moretti, Stefano (Southampton U. ; Rutherford) ; Bertone, Valerio (Pavia U.) ; Giuli, Francesco (Rome U., Tor Vergata ; INFN, Rome2) ; Abdolmaleki, Hamen (Semnan U.) ; Luszczak, Agnieszka (Cracow Tech. U.) ; Glazov, Alexander (DESY) ; Olness, Fred (Southern Methodist U.) et al.
/xFitter Developers' team
Non-perturbative QCD effects from Parton Distribution Functions (PDFs) may be constrained by using high-statistics Large Hadron Collider (LHC) data. Drell-Yan (DY) measurements in the Charged Current (CC) case provide one of the primary means to do this, in the form of the lepton charge asymmetry. [...]
arXiv:1907.07727; DESY-19-127; MS-TP-19-19; CERN-TH-2019-110.-
2019-10-15 - 21 p.
- Published in : JHEP 1910 (2019) 176
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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3.
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Production of Z'-Boson Resonances with Large Width at the LHC
/ Accomando, E. (Southampton U.) ; Coradeschi, F. (Cambridge U., DAMTP) ; Cridge, T. (University Coll. London) ; Fiaschi, J. (Munster U., ITP) ; Hautmann, F. (Antwerp U. ; Oxford U. ; Basque U., Bilbao ; CERN) ; Moretti, S. (Southampton U.) ; Shepherd-Themistocleous, C. (Rutherford) ; Voisey, C. (Cambridge U.)
Di-lepton searches for Beyond the Standard Model (BSM) Z' bosons that rely on the analysis of the Breit-Wigner (BW) line shape are appropriate in the case of narrow resonances, but likely not sufficient in scenarios featuring Z' states with large widths. Conversely, alternative experimental strategies applicable to wide Z' resonances are much more dependent than the default bump search analyses on the modelling of QCD higher-order corrections to the production processes, for both signal and background. [...]
arXiv:1910.13759.-
2020-04-10 - 8 p.
- Published in : Phys. Lett. B 803 (2020) 135293
Article from SCOAP3: PDF;
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4.
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5.
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Enhancing the Large Hadron Collider Sensitivity to Charged and Neutral Broad Resonances of New Gauge Sectors
/ Fiaschi, Juri (Liverpool U., Dept. Math.) ; Giuli, Francesco (CERN ; INFN, Rome2 ; Rome U., Tor Vergata) ; Hautmann, Francesco (Antwerp U. ; Oxford U.) ; Moretti, Stefano (Southampton U.)
In scenarios beyond the Standard Model (BSM) characterized by charged ($W^\prime$) or neutral ($Z^\prime$) massive gauge bosons with large width, resonant mass searches are not very effective, so that one has to exploit the tails of the mass distributions measured at the Large Hadron Collider (LHC). In this case, the LHC sensitivity to new physics signals is influenced significantly by systematic uncertainties associated with the Parton Distribution Functions (PDF), particularly in the valence quark sector relevant for the multi-TeV mass region. [...]
arXiv:2111.09698; LTH 1277.-
2022-02-22 - 16 p.
- Published in : JHEP 02 (2022) 179
Fulltext: 2111.09698 - PDF; document - PDF;
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6.
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Forward-backward asymmetry of Drell-Yan pairs
/CMS Collaboration
We present a measurement of the forward-backward asymmetry (A$_{\rm FB}$) for opposite charge lepton pairs produced via an intermediate Z/$\gamma^*$ at $\sqrt{s}$ = 7 TeV in the CMS experiment. Our results are based on an integrated luminosity of 4.7 fb$^{-1}$. [...]
CMS-PAS-EWK-11-004.-
Geneva : CERN, 2012
Figure_001: PDF; Figure_002: PDF; Figure_003: PDF; Fulltext in PDF: PDF;
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8.
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Forward-Backward Asymmetry of di-Lepton Pairs and the Weak-mixing Angle
/CMS Collaboration
We present a measurement of the forward-backward asymmetry (A$_{\rm FB}$) of opposite sign lepton pairs ($e^+e^-$ and $\mu^+\mu^-$) produced via an intermediate Z/$\gamma*$ in LHC proton-proton collisions at $\sqrt{s}$ = 7 TeV. We also present a measurement of the effective weak-mixing angle ($\theta_{\rm eff}$) via a multivariate likelihood fit of the rapidity, di-lepton invariant mass, and decay angle distributions.
Our results are based on an integrated luminosity up to 40~pb$^{-1}$. [...]
CMS-PAS-EWK-10-011.-
Geneva : CERN, 2011
Figure_001-a: PDF; Figure_001-b: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003: PDF; Figure_004: PDF; Fulltext in PDF: PDF;
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9.
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Complementarity of Lepton-Charge and Forward-Backward Drell-Yan Asymmetries for Precision Electroweak Measurements and Quark Density Determinations
/ Fiaschi, Juri (Liverpool U., Dept. Math.) ; Giuli, Francesco (CERN ; INFN, Rome2 ; Rome U., Tor Vergata) ; Hautmann, Francesco (Antwerp U. ; Oxford U.) ; Moretti, Stefano (Southampton U.)
We address the impact of future measurements of charged and neutral current Drell-Yan (DY) asymmetries and their combination on Parton Distribution Functions (PDFs) uncertainties. We quantify the reduction of PDF uncertainties using the QCD tool xFitter. [...]
arXiv:2107.03099; LTH 1263.-
2022-07-12 - 6 p.
- Published in : SciPost Phys. Proc.: 8 (2022) , pp. 038
Fulltext: document - PDF; 2107.03099 - PDF;
In : XXVIII International Workshop on Deep-Inelastic Scattering and Related Subjects, Online, Online, 12 - 16 Apr 2021, pp.038
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10.
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Forward-Backward Drell-Yan Asymmetry and PDF Determination
/ Abdolmaleki, H. (Unlisted) ; Accomando, E. (Unlisted) ; Bertone, V. (Unlisted) ; Fiaschi, J. (Unlisted) ; Giuli, F. (Unlisted) ; Glazov, A. (Unlisted) ; Hautmann, F. (Unlisted) ; Luszczak, A. (Unlisted) ; Moretti, S. (Unlisted) ; Novikov, I. (Unlisted) et al.
We investigate the impact of high-statistics Drell-Yan (DY) measurements at the LHC on the study of non-perturbative QCD effects from parton distribution functions (PDF). We present the results of a PDF profiling analysis based on the neutral-current DY forward-backward asymmetry, using the open source fit platform xFitter..
arXiv:1907.08301; CERN-TH-2019-116.-
ARISF, 2019 - 4 p.
- Published in : , pp. 211-214
Fulltext: PDF;
In : 54th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 23 - 30 Mar 2019, pp.211-214
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