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Determination and application of TMD parton densities using the Parton Branching method
/ Bermudez Martinez, A. (DESY) ; Connor, P. (DESY) ; Hautmann, F. (Rutherford ; Oxford U. ; U. Antwerp (main)) ; Jung, H. (DESY) ; Lelek, A. (DESY) ; Radescu, V. (Oxford U. ; CERN) ; Žlebčík, R. (DESY)
We present a determination of parton densities at NLO obtained with the Parton Branching method using precision measurements of deep inelastic scattering cross sections at HERA. The two sets of parton densities shown in this work are obtained with the same angular angular ordering condition for the evolution scale and they differ in the chosen scale for the strong coupling evaluation, for which we consider two scenarios: the evolution scale, and the transverse momentum qT from the angular ordering prescription. [...]
arXiv:1809.04511; DESY-18-156.-
SISSA, 2018-09-10 - 6 p.
- Published in : PoS DIS2018 (2018) 013
Fulltext: PDF; External link: PoS server
In : XXVI International Workshop on Deep Inelastic Scattering and Related Subjects, Kobe, Hyogo, Japan, 16 - 20 Apr 2018, pp.013
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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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Collider constraints on light pseudoscalars
/ Haisch, Ulrich (Oxford U., Theor. Phys. ; CERN) ; Kamenik, Jernej F. (Stefan Inst., Ljubljana ; Ljubljana U.) ; Malinauskas, Augustinas (Oxford U., Theor. Phys.) ; Spira, Michael (PSI, Villigen)
We investigate the bounds on light pseudoscalars that arise from a variety of collider searches. Special attention is thereby devoted to the mass regions $[3, 5] \, {\rm GeV}$ and $[9,11] \, {\rm GeV}$, in which a meaningful theoretical description has to include estimates of non-perturbative effects such as the mixing of the pseudoscalar with QCD bound states. [...]
arXiv:1802.02156; CERN-TH-2018-025; PSI-PR-18-03.-
2018-03-28 - 17 p.
- Published in : JHEP 03 (2018) 178
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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Momentum-space resummation for transverse observables and the Higgs $p_\perp$ at N$^3$LL+NNLO
/ Bizon, Wojciech (Oxford U., Theor. Phys.) ; Monni, Pier Francesco (CERN) ; Re, Emanuele (CERN ; Annecy, LAPTH) ; Rottoli, Luca (Oxford U., Theor. Phys.) ; Torrielli, Paolo (Turin U. ; INFN, Turin)
We present an approach to the momentum-space resummation of global, recursive infrared and collinear safe observables featuring kinematic zeros away from the Sudakov limit. In the hadro-production of a generic colour singlet, we consider the family of inclusive observables which do not depend on the rapidity of the radiation, prime examples being the transverse momentum of the singlet, and $\phi^*$ in Drell-Yan pair production. [...]
arXiv:1705.09127; OUTP-17-05P; CERN-TH-2017-111; LAPTH-018-17.-
2018-02-19 - 50 p.
- Published in : JHEP 02 (2018) 108
Article from SCOAP3: PDF; Fulltext: arXiv:1705.09127 - PDF; 1705.09127 - PDF;
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Let there be light from a second light Higgs doublet
/ Haisch, Ulrich (CERN ; Oxford U., Theor. Phys.) ; Malinauskas, Augustinas (Oxford U., Theor. Phys.)
In this article, we demonstrate that the unexpected peak at around $95 \, {\rm GeV}$ as seen recently by CMS in the di-photon final state can be explained within the type-I~two-Higgs-doublet model by means of a moderately-to-strongly fermiophobic CP-even Higgs $H$. Depending on the Higgs mass spectrum, the production of such~a~$H$ arises dominantly from vector boson fusion or through a cascade in either $pp \to t \bar t$ with $\overset{(-)}{t} \to H^{\pm} \overset{(-)}{b} \to W^{\pm \, \ast} H \overset{(-)}{b}$ or $pp \to A$ with $A \to W^{\mp} H^{\pm} \to W^{\mp} W^{\pm} H$ or via $pp \to W^{\pm \, \ast} \to H^\pm H$. [...]
arXiv:1712.06599; CERN-TH-2017-276.-
2018-03-22 - 21 p.
- Published in : JHEP 03 (2018) 135
Article from SCOAP3: PDF; Fulltext: PDF;
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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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Fiducial distributions in Higgs and Drell-Yan production at N$^3$LL+NNLO
/ Bizoń, Wojciech (Oxford U., Theor. Phys.) ; Chen, Xuan (Zurich U.) ; Gehrmann-De Ridder, Aude (Zurich U. ; Zurich, ETH) ; Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Huss, Alexander (CERN) ; Monni, Pier Francesco (CERN) ; Re, Emanuele (CERN ; Annecy, LAPTH) ; Rottoli, Luca (Oxford U., Theor. Phys.) ; Torrielli, Paolo (Turin U. ; INFN, Turin)
The perturbative description of certain differential distributions across a wide kinematic range requires the matching of fixed-order perturbation theory with resummation of large logarithmic corrections to all orders. We present precise matched predictions for transverse-momentum distributions in Higgs boson (H) and Drell-Yan pair (DY) production as well as for the closely related ${\phi^{*}_\eta}$ distribution at the LHC. [...]
arXiv:1805.05916; CERN-TH-2018-105; IPPP/18/34; LAPTH-015/18; OUTP-17-19P; ZU-TH 17/18; IPPP-18-34; LAPTH-015-18; ZU-TH-17-18.-
2018-12-21 - 42 p.
- Published in : JHEP 12 (2018) 132
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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