002670098 001__ 2670098
002670098 005__ 20220627042537.0
002670098 0248_ $$aoai:cds.cern.ch:2670098$$pcerncds:CERN$$pcerncds:CERN:FULLTEXT$$pcerncds:FULLTEXT
002670098 0247_ $$2DOI$$9arXiv$$a10.1007/JHEP04(2020)166$$qpublication
002670098 037__ $$9arXiv$$aarXiv:1904.01044$$chep-ph
002670098 037__ $$9arXiv:reportnumber$$aIPPP-19-23
002670098 037__ $$9arXiv:reportnumber$$aZU-TH-13-19
002670098 037__ $$9arXiv:reportnumber$$aIPPP/19/23
002670098 035__ $$9arXiv$$aoai:arXiv.org:1904.01044
002670098 037__ $$9arXiv:reportnumber$$aZU-TH 13/19
002670098 035__ $$9Inspire$$aoai:inspirehep.net:1727794$$d2022-06-25T11:21:28Z$$h2022-06-27T02:05:21Z$$mmarcxml$$ttrue$$uhttps://inspirehep.net/api/oai2d
002670098 037__ $$9arXiv:reportnumber$$aCERN-TH-2019-034
002670098 035__ $$9Inspire$$a1727794
002670098 041__ $$aeng
002670098 100__ $$aChen, Xuan$$jORCID:[email protected]$$tGRID:grid.7400.3$$uZurich U.$$vPhysik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
002670098 245__ $$9arXiv$$aIsolated photon and photon+jet production at NNLO QCD accuracy
002670098 269__ $$c2019-04-01
002670098 260__ $$c2020-04-24
002670098 300__ $$a30 p
002670098 500__ $$aSubmitted to J.High Energy Phys.
002670098 500__ $$9Inspire$$aSubmitted to J.High Energy Phys.
002670098 500__ $$9arXiv$$aJHEP version, 30 pages, 17 figures
002670098 520__ $$9arXiv$$aWe describe the calculation of the next-to-next-to-leading order (NNLO) QCD corrections to isolated photon and photon-plus-jet production, and discuss how the experimental hadron-level photon definition and isolation criteria can be approximated in the theoretical parton-level calculation. The NNLO corrections lead to a considerable reduction of the theory uncertainty on the predictions, typically to less than five per cent, and enable an improved description of experimental measurements from ATLAS and CMS.
002670098 540__ $$3preprint$$aarXiv nonexclusive-distrib 1.0$$uhttp://arxiv.org/licenses/nonexclusive-distrib/1.0/
002670098 540__ $$3publication$$aCC-BY-4.0$$uhttps://creativecommons.org/licenses/by/4.0/
002670098 542__ $$3publication$$dThe Authors$$g2020
002670098 595__ $$aCERN-TH
002670098 65017 $$2arXiv$$ahep-ph
002670098 65017 $$2SzGeCERN$$aParticle Physics - Phenomenology
002670098 690C_ $$aCERN
002670098 690C_ $$aARTICLE
002670098 700__ $$aGehrmann, Thomas$$jORCID:[email protected]$$tGRID:grid.7400.3$$uZurich U.$$vPhysik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
002670098 700__ $$aGlover, [email protected]$$tGRID:grid.8250.f$$uDurham U., IPPP$$vInstitute for Particle Physics Phenomenology, Durham University, DH1 3LE Durham, UK
002670098 700__ $$aHöfer, [email protected]$$tGRID:grid.7400.3$$uZurich U.$$vPhysik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
002670098 700__ $$aHuss, Alexander$$jORCID:[email protected]$$tGRID:grid.9132.9$$uCERN$$vTheoretical Physics Department, CERN, CH-1211 Geneva 23, Switzerland
002670098 773__ $$c166$$mpublication$$pJHEP$$v2020$$xChen, X., Gehrmann, T., Glover, N. et al. Isolated photon and
photon+jet production at NNLO QCD accuracy. J. High Energ. Phys. 2020, 166
(2020)$$y2020
002670098 8564_ $$82209246$$s9696$$uhttp://cds.cern.ch/record/2670098/files/dphi_gam_j1_ATLAS.png$$y00006 Azimuthal separation of the photon and the leading jet, at LO, NLO and NNLO. The predictions are compared to ATLAS data~\protect{\cite{Aaboud:2017kff}}.
002670098 8564_ $$82209247$$s12798$$uhttp://cds.cern.ch/record/2670098/files/GJ13_ptj1_ATLAS_patched.png$$y00011 Transverse momentum distribution of the leading jet in photon-plus-jet events, at LO, NLO and NNLO\@. The grey dashed line marks the cut on the $p_T$ of the photon, the recoil of which mostly goes into the leading jet. The predictions are compared to ATLAS data~\protect{\cite{Aaboud:2017kff}}.
002670098 8564_ $$82209248$$s9410$$uhttp://cds.cern.ch/record/2670098/files/GJ8_Et_gam_MCFM_CMS_val_patched.png$$y00009 Ratio to NNLO for the transverse energy/momentum of the photon at NLO and NNLO, using the PDF and isolation procedure choice of MCFM~\protect{\cite{Campbell:2017dqk}}. The default NNLO result is shown in grey.
002670098 8564_ $$82209249$$s36682$$uhttp://cds.cern.ch/record/2670098/files/GJ13_Et_gam_CMS_patched.png$$y00016 Transverse energy/momentum distribution of the photon at LO, NLO and NNLO in two different rapidity bins for the photon and the leading jet, each. The results are compared to CMS data~\protect{\cite{Sirunyan:2018gro}}. Note that the data has been multiplied by the corresponding rapidity bin-widths, as CMS presents the data in triple-differential form in ($p_T^\gamma,y^\gamma,y^j$).
002670098 8564_ $$82209250$$s9231$$uhttp://cds.cern.ch/record/2670098/files/R_dep_GJ_13_ATLAS_v3.png$$y00001 Dependence of the total cross section for photon + jet production (ATLAS 13~TeV measurement~\protect\cite{Aaboud:2017kff}) at NLO and NNLO on the conesize $R_d$ of the inner dynamical cone used in the hybrid isolation procedure. All other isolation parameters are fixed: $\varepsilon_d=0.1$, $n=2$, $R=0.4$, $E_T^\mathrm{thres}=10~\GeV$, $\varepsilon=0.0042$. The line is a fit of a function with form $f(R_d)=a\cdot\log(1/R_d)+b$ to the NLO prediction at the central scale. The NLO prediction for fixed cone isolation is obtained with the BFG parametrization~\protect\cite{Bourhis:1997yu} of the photon fragmentation functions, and computed with the JETPHOX code~\protect\cite{Catani:2002ny}. Its uncertainty band contains only variations of the factorization and renormalization scales, while the small fragmentation scale uncertainty is superimposed on the central and extremal values. The LO prediction is independent on the isolation procedue.
002670098 8564_ $$82209251$$s11713$$uhttp://cds.cern.ch/record/2670098/files/abs_costhetastar_gam_j1_ATLAS.png$$y00000 Distribution in $\left|\cos\theta^*\right|$ at LO, NLO and NNLO. The predictions are compared to ATLAS data~\protect{\cite{Aaboud:2017kff}}.
002670098 8564_ $$82209252$$s9290$$uhttp://cds.cern.ch/record/2670098/files/GJ13_dphi_gam_j1_ATLAS_patched.png$$y00013 Azimuthal separation of the photon and the leading jet, at LO, NLO and NNLO\@. The predictions are compared to ATLAS data~\protect{\cite{Aaboud:2017kff}}.
002670098 8564_ $$82209253$$s12073$$uhttp://cds.cern.ch/record/2670098/files/iG8_Et_gam_MCFM_ATLAS_val_patched.png$$y00003 Ratio to ATLAS data~\protect{\cite{Aad:2016xcr}} for the transverse energy/momentum of the photon at NLO and NNLO, using the PDF and isolation procedure choice of MCFM~\protect{\cite{Campbell:2016lzl}}. The results are rescaled by a factor of $1.03387$ to account for the different choice of $\alpha_\mathrm{em}$. The NNLO result obtained using the default PDF and isolation procedure choice is shown in grey.
002670098 8564_ $$82209254$$s25961$$uhttp://cds.cern.ch/record/2670098/files/GJ13_abs_y_ATLAS_patched.png$$y00015 Rapidity distribution of the photon (top left), of the leading jet (top right), distribution of the rapidity sum of both (bottom left) and of the rapidity difference (bottom right), at LO, NLO and NNLO.
002670098 8564_ $$82209255$$s27324$$uhttp://cds.cern.ch/record/2670098/files/abs_y_ATLAS.png$$y00011 Rapidity distribution of the photon (top left), of the leading jet (top right), distribution of the rapidity sum of both (bottom left) and of the rapidity difference (bottom right), at LO, NLO and NNLO.
002670098 8564_ $$82209256$$s849503$$uhttp://cds.cern.ch/record/2670098/files/1904.01044.pdf$$yFulltext
002670098 8564_ $$82209257$$s14552$$uhttp://cds.cern.ch/record/2670098/files/GJ_13_Et_gam_ATLAS.png$$y00008 Transverse momentum distribution of the photon in photon-plus-jet events, at LO, NLO and NNLO. The predictions are compared to ATLAS data~\protect{\cite{Aaboud:2017kff}}.
002670098 8564_ $$82209258$$s51991$$uhttp://cds.cern.ch/record/2670098/files/iG8_Et_gam_MCFM_ATLAS_patched.png$$y00004 Transverse energy/momentum distribution of isolated photons at LO, NLO, NNLO in four different rapidity bins, from central (top left) to most forward (bottom right). The results are compared to 8 TeV ATLAS data~\protect{\cite{Aad:2016xcr}}.
002670098 8564_ $$82209259$$s18134$$uhttp://cds.cern.ch/record/2670098/files/GJ8_Et_gam_MCFM_CMS_patched.png$$y00008 Transverse energy/momentum distribution of the photon at NLO and NNLO for different central scale choices: $p_T^\gamma$ in blue, $H_T$ in red. The calculations are carried out using the NNPDF3.1 NNLO PDF set~\protect{\cite{Ball:2017nwa}} and the hybrid isolation procedure. The results are compared to 8~TeV CMS data~\protect{\cite{Khachatryan:2015ira}}.
002670098 8564_ $$82209260$$s12904$$uhttp://cds.cern.ch/record/2670098/files/GJ13_m_gam_j1_ATLAS_patched.png$$y00012 Invariant mass of the photon leading jet system, at LO, NLO and NNLO. The predictions are compared to ATLAS data~\protect{\cite{Aaboud:2017kff}}.
002670098 8564_ $$82209261$$s13272$$uhttp://cds.cern.ch/record/2670098/files/ptj1_ATLAS.png$$y00009 Transverse momentum distribution of the leading jet in photon-plus-jet events, at LO, NLO and NNLO. The grey dashed line marks the cut on the $p_T$ of the photon, the recoil of which mostly goes into the leading jet. The predictions are compared to ATLAS data~\protect{\cite{Aaboud:2017kff}}.
002670098 8564_ $$82209262$$s19066$$uhttp://cds.cern.ch/record/2670098/files/cross_GJ_13_ATLAS.png$$y00000 Total cross section for different parameter choices ($\varepsilon_d=0.05,0.1,0.15$, $n=\frac{1}{2},1,2$) for both dynamical photon isolation (\dynIso)~\protect{\cite{Frixione:1998jh}} (dark colours) and the dynamical cone part of the hybrid photon isolation (\hybIso) (light colours). The default cone size for \dynIso is $R_d=0.4$, while for \hybIso it is $R_d=0.1$. For the specific parameter choice $\varepsilon_d=0.1, n=2$ we also investigate variations of the cone size by factors $\frac{1}{2}$ and $2$. The fixed cone parameters of the hybrid isolation are chosen according to the ATLAS measurement~\protect{\cite{Aaboud:2017kff}}. The \fixIso~prediction (using JETPHOX~\cite{Catani:2002ny}) and the ATLAS measurement are shown for comparison.
002670098 8564_ $$82209263$$s42812$$uhttp://cds.cern.ch/record/2670098/files/iG13_Et_gam_ATLAS_patched.png$$y00005 Transverse energy/momentum distribution of isolated photons at LO, NLO and NNLO in four different rapidity bins, from central (top left) to most forward (bottom right). The results are compared to 13 TeV ATLAS data~\protect{\cite{Aaboud:2017cbm}}.
002670098 8564_ $$82209264$$s15364$$uhttp://cds.cern.ch/record/2670098/files/Et_gam_bin1_MCFM_ATLAS_comp.png$$y00001 Impact of the choice of the photon isolation criterion (dynamical isolation~\protect{\cite{Frixione:1998jh}} versus hybrid isolation, top frame) and PDF set (CT14~\protect{\cite{Dulat:2015mca}} versus NNPDF3.1~\protect{\cite{Ball:2017nwa}}, bottom frame) at NLO, shown as ratio to our default choice of NNPDF3.1 with hybrid isolation.
002670098 8564_ $$82209265$$s39459$$uhttp://cds.cern.ch/record/2670098/files/GJ_13_Et_gam_CMS.png$$y00004 Transverse energy/momentum distribution of the photon at LO, NLO and NNLO in two different rapidity bins for the photon and the leading jet, each. The results are compared to CMS data~\protect{\cite{Sirunyan:2018gro}}. Note that the data has been multiplied by the corresponding rapidity bin-widths, as CMS presents the data in triple-differential form in ($p_T^\gamma,y^\gamma,y^j$).
002670098 8564_ $$82209266$$s37230$$uhttp://cds.cern.ch/record/2670098/files/iG_13_Et_gam_CMS.png$$y00007 Transverse energy/momentum distribution of the photon at LO, NLO and NNLO in four different rapidity bins, from central (top left) to most forward (bottom right). The results are compared to 13 TeV CMS data~\protect{\cite{Sirunyan:2018gro}}. Note that for the sake of comparison the data has been multiplied by the corresponding rapidity bin-width, as CMS presents the data in double-differential form in $p_T^\gamma,\,y^\gamma$.
002670098 8564_ $$82209267$$s48536$$uhttp://cds.cern.ch/record/2670098/files/R_dep_iG_13_ATLAS_y_bins_v2.png$$y00010 Dependence of the total cross section for inclusive photon production at $13~\TeV$ at LO, NLO and NNLO on the conesize $R$ of the outer fixed cone used in the hybrid isolation procedure, for different regions of the photon rapidity. All other isolation parameters are fixed: $R_d=0.1$, $\varepsilon_d=0.1$, $n=2$, $E_T^\mathrm{thres}=4.8~\GeV$, $\varepsilon=0.0042$. The dashed line marks the cone size $R_d$ of the dynamical cone. The ATLAS measurement~\protect{\cite{Aaboud:2017cbm}} is performed only for a fixed cone with size $R=0.4$.
002670098 8564_ $$82209268$$s13882$$uhttp://cds.cern.ch/record/2670098/files/GJ13_Et_gam_ATLAS_patched.png$$y00010 Transverse momentum distribution of the photon in photon-plus-jet events, at LO, NLO and NNLO\@. The predictions are compared to ATLAS data~\protect{\cite{Aaboud:2017kff}}.
002670098 8564_ $$82209269$$s11024$$uhttp://cds.cern.ch/record/2670098/files/GJ13_abs_costhetastar_gam_j1_ATLAS_patched.png$$y00014 Distribution in $\left|\cos\theta^*\right|$ at LO, NLO and NNLO\@. The predictions are compared to ATLAS data~\protect{\cite{Aaboud:2017kff}}.
002670098 8564_ $$82209270$$s13213$$uhttp://cds.cern.ch/record/2670098/files/m_gam_j1_ATLAS.png$$y00016 Invariant mass of the photon leading jet system, at LO, NLO and NNLO. The predictions are compared to ATLAS data~\protect{\cite{Aaboud:2017kff}}.
002670098 8564_ $$82209271$$s34647$$uhttp://cds.cern.ch/record/2670098/files/iG13_Et_gam_CMS_patched.png$$y00006 Transverse energy/momentum distribution of the photon at LO, NLO and NNLO in four different rapidity bins, from central (top left) to most forward (bottom right). The results are compared to 13 TeV CMS data~\protect{\cite{Sirunyan:2018gro}}. Note that for the sake of comparison the data has been multiplied by the corresponding rapidity bin-width, as CMS presents the data in double-differential form in $p_T^\gamma,\,y^\gamma$.
002670098 8564_ $$82209272$$s18307$$uhttp://cds.cern.ch/record/2670098/files/Et_gam_MCFM_CMS.png$$y00005 Transverse energy/momentum distribution of the photon at NLO and NNLO for different central scale choices: $p_T^\gamma$ in blue, $H_T$ in red. The calculations are carried out using the NNPDF3.1 NNLO PDF set~\protect{\cite{Ball:2017nwa}} and the hybrid isolation procedure. The results are compared to 8~TeV CMS data~\protect{\cite{Khachatryan:2015ira}}.
002670098 8564_ $$82209273$$s49116$$uhttp://cds.cern.ch/record/2670098/files/Et_gam_MCFM_ATLAS.png$$y00002 Transverse energy/momentum distribution of isolated photons at LO, NLO, NNLO in four different rapidity bins, from central (top left) to most forward (bottom right). The results are compared to 8 TeV ATLAS data~\protect{\cite{Aad:2016xcr}}.
002670098 8564_ $$82209274$$s41318$$uhttp://cds.cern.ch/record/2670098/files/iG_13_Et_gam_ATLAS.png$$y00003 Transverse energy/momentum distribution of isolated photons at LO, NLO and NNLO in four different rapidity bins, from central (top left) to most forward (bottom right). The results are compared to 13 TeV ATLAS data~\protect{\cite{Aaboud:2017cbm}}.
002670098 8564_ $$82209275$$s15395$$uhttp://cds.cern.ch/record/2670098/files/iG8_Et_gam_bin1_MCFM_ATLAS_comp.png$$y00002 Impact of the choice of the photon isolation criterion (dynamical isolation~\protect{\cite{Frixione:1998jh}} and fixed-cone isolation (produced with JETPHOX~\protect\cite{Catani:2002ny}) versus hybrid isolation, top frame) and PDF set (CT14~\protect{\cite{Dulat:2015mca}} versus NNPDF3.1~\protect{\cite{Ball:2017nwa}}, bottom frame) at NLO, shown as ratio to our default choice of NNPDF3.1 with hybrid isolation.
002670098 8564_ $$82209276$$s9562$$uhttp://cds.cern.ch/record/2670098/files/Et_gam_MCFM_CMS_val.png$$y00012 Ratio to NNLO for the transverse energy/momentum of the photon at NLO and NNLO, using the PDF and isolation procedure choice of MCFM~\protect{\cite{Campbell:2017dqk}}. The default NNLO result is shown in grey.
002670098 8564_ $$82209277$$s10915$$uhttp://cds.cern.ch/record/2670098/files/Et_gam_MCFM_ATLAS_val.png$$y00014 Ratio to ATLAS data~\protect{\cite{Aad:2016xcr}} for the transverse energy/momentum of the photon at NLO and NNLO, using the PDF and isolation procedure choice of MCFM~\protect{\cite{Campbell:2016lzl}}. The results are rescaled by a factor of $1.03387$ to account for the different choice of $\alpha_\mathrm{em}$. The NNLO result obtained using the default PDF and isolation procedure choice is shown in grey.
002670098 8564_ $$82209278$$s46816$$uhttp://cds.cern.ch/record/2670098/files/R_dep_iG_13_ATLAS_y_bins_v2_patched.png$$y00007 Dependence of the total cross section for inclusive photon production at $13~\TeV$ at LO, NLO and NNLO on the cone size $R$ of the outer fixed cone used in the hybrid isolation procedure, for different regions of the photon rapidity. All other isolation parameters are fixed: $R_d=0.1$, $\varepsilon_d=0.1$, $n=2$, $E_T^\mathrm{thres}=4.8~\GeV$, $\varepsilon=0.0042$. The dashed line marks the cone size $R_d$ of the dynamical cone. The ATLAS measurement~\protect{\cite{Aaboud:2017cbm}} is performed only for a fixed cone with size $R=0.4$.
002670098 8564_ $$82209279$$s768512$$uhttp://cds.cern.ch/record/2670098/files/scoap3-fulltext.pdf$$yArticle from SCOAP3
002670098 8564_ $$82334488$$s768512$$uhttp://cds.cern.ch/record/2670098/files/scoap.pdf$$yArticle from SCOAP3
002670098 960__ $$a13
002670098 980__ $$aARTICLE