Semi-NLO production of Higgs bosons in the framework of k-factorization using KMR unintegrated parton distributions

Modarres, M.; Masouminia, M. R.; Nik, R. Aminzadeh; Hosseinkhani, H.; Olanj, N.

doi:10.1016/j.nuclphysb.2017.11.015

Cited by 20 publications

(22 citation statements)

References 52 publications

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“…They also extends the LO-MRW approach to the NLO level (NLO-MRW). One can find a detailed investigation of these UPDFs in the references [19][20][21], and also effects of using these UPDFs in cross section calculations are discussed in the references [22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Three-photon productions within the $$k_t$$-factorization at the LHC

2021

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Recently, the ATLAS data of isolated three-photon production showed that the next-to-leading order (NLO) collinear factorization is not enough to describe experimental data. Therefore, one needs to calculate the cross section beyond the NLO, and as showed later, these data can be well described by the NNLO calculation within the collinear factorization framework. However, it is shown that the $$k_t$$ k t -factorization can be quite successful in describing exclusive and high energy collision processes, henceforth we decided to calculate isolated three-photon production within this framework. In this work we use the Martin, Ryskin, and Watt unintegrated parton distribution functions (MRW UPDFs) at LO and NLO levels, in addition to parton branching (PB) UPDFs in order to calculate cross section which we utilize the KATIE parton level event generator. It will be shown that in contrast to collinear factorization, the $$k_t$$ k t -factorization can describe quiet well the three-photon production ATLAS data. Interestingly our results using the NLO-MRW and PB UPDFs can cover the data within their uncertainty bands, similar to the NNLO collinear results.

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Section: Introductionmentioning

confidence: 99%

Three-photon productions within the $$k_t$$-factorization at the LHC

2021

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“…The MEs of the relevant sub-processes are calculated using the Feynman rules in combination with the eikonal and the non-sense polarization approximations for the incoming quarks and gluons [28,31]. One should note that these MEs need to be calculated up to the leptonic levels in order to produce comparable results with their counterparts in Herwig 7.…”

Section: B K T -Factorisation Framework and Kmr Updfsmentioning

confidence: 99%

“…The predicted signals are compared with the experimental measurements from the ATLAS collaboration [21,22] and against third-party theoretical predictions within the k t -factorisation framework, using the unintegrated parton distribution functions (UPDFs) of Kimber-Martin-Ryskin (KMR) [23,24]. The latter framework has been used as a control signal since its validity in correctly predicting the behavior of experimental observations has been repeatedly proven to be independent of the use parton shower enhancements [25][26][27][28][29][30], while being computationally expensive and unsuitable for use in multi-purpose event generators.…”

Section: Introductionmentioning

confidence: 99%

Electroweak Radiative Corrections in Precision LHC Measurements of $W^\pm/Z^0$+jets

Darvishi,

Masouminia

2021

Preprint

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We calculate the fiducial and differential cross-sections of W ± /Z 0 production in association with hadronic jets in the presence of electroweak (EW) corrections through virtual gauge boson self-interactions in the matrix elements (MEs) of the processes and real partonic cascade emissions. The calculations are carried out for protonproton collisions at √ s = 13 TeV, using Herwig 7 multi-purpose Monte-Carlo event generator with leading-order or next-to-leading-order MEs that are interfaced with different parton-shower configurations. The results are compared with experimental measurements from ATLAS collaboration and with similar computations within the k t -factorisation framework, providing a test for the validity of the newly-implemented QCD⊕QED⊕EW parton shower in Herwig 7. It is shown that the inclusion of EW radiations in the parton shower simulations improves Herwig's predictions in describing the experimental data. Additionally, the inclusion of real EW emissions can take precedence over the incorporation of virtual EW corrections for the simulation of EW-sensitive events.

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“…In our previous articles, we investigated the general behavior and stability of the KM R and M RW schemes [19][20][21][22][23][24][25][26][27]. Also, we have successfully used KM R-U P DF to calculate the inclusive production of the W and Z gauge vector bosons [28,29], the semi-N LO production of Higgs bosons [30], the production of forward-center and forward-forward di-jets [31], the prompt-photon pair production [32] and recently in the reference [33], we explored the phenomenology of the integral and the differential versions of the KM R-U P DF using the angular (strong) ordering (AOC (SOC)) constraints. But here, to check the reliability of generated U P DF , we use them to calculate the observable, deep inelastic scattering the charm structure functions (F cc 2 (x, Q 2 )).…”

Section: Introductionmentioning

confidence: 99%

A detailed study of charm content of a proton in the frameworks of the Kimber-Martin-Ryskin and Martin-Ryskin-Watt approaches

Olanj,

Modarres

2021

Preprint

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The charm structure function, (F cc 2 (x, Q 2 )), is calculated in the framework of the k t -factorization formalism by using the unintegrated parton distribution functions (U P DF ), which are generated through the Kimber et al. (KM R) and M artin et al. (M RW ) procedures. The M artin group (M M HT 2014) parton distribution functions (P DF ) is used as the input P DF for the corresponding U P DF . The resulted F cc 2 (x, Q 2 ) is compared with the predicted data and the calculations given by the ZEU S and H1 collaborations, the parton pQCD theory, i.e. the general-mass variableflavour-number scheme (GM V F N S), the LO collinear procedure and the saturation model introduced by Golec − Biernat and W üsthof f (GBW ), respectively. In general, it is shown that the calculated charm structure functions based on the stated above two U P DF schemes are consistent with the experimental data and other theoretical predictions. Also, a short discussion is presented regarding the KM R and M RW U P DF behaviors.

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Semi-NLO production of Higgs bosons in the framework of k-factorization using KMR unintegrated parton distributions

Cited by 20 publications

References 52 publications

Three-photon productions within the $$k_t$$-factorization at the LHC

Three-photon productions within the $$k_t$$-factorization at the LHC

Electroweak Radiative Corrections in Precision LHC Measurements of $W^\pm/Z^0$+jets

A detailed study of charm content of a proton in the frameworks of the Kimber-Martin-Ryskin and Martin-Ryskin-Watt approaches

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