Publications by Luca Rottoli


Momentum-space resummation for transverse observables and the Higgs p perpendicular to at (NLL)-L-3+NNLO

JOURNAL OF HIGH ENERGY PHYSICS (2018) ARTN 108

W Bizon, PF Monni, E Re, L Rottoli, P Torrielli


Parton distributions with small-x resummation: evidence for BFKL dynamics in HERA data

EUROPEAN PHYSICAL JOURNAL C 78 (2018) ARTN 321

RD Ball, V Bertone, M Bonvini, S Marzani, J Rojo, L Rottoli


Fiducial distributions in Higgs and Drell-Yan production at (NLL)-L-3+NNLO

JOURNAL OF HIGH ENERGY PHYSICS (2018) ARTN 132

W Bizon, X Chen, A Gehrmann-De Ridder, T Gehrmann, N Glover, A Huss, PF Monni, E Re, L Rottoli, P Torrielli


Charged hadron fragmentation functions from collider data: NNPDF Collaboration.

The European physical journal. C, Particles and fields 78 (2018) 651-

V Bertone, NP Hartland, ER Nocera, J Rojo, L Rottoli

We present NNFF1.1h, a new determination of unidentified charged-hadron fragmentation functions (FFs) and their uncertainties. Experimental measurements of transverse-momentum distributions for charged-hadron production in proton-(anti)proton collisions at the Tevatron and at the LHC are used to constrain a set of FFs originally determined from electron-positron annihilation data. Our analysis is performed at next-to-leading order in perturbative quantum chromodynamics. We find that the hadron-collider data is consistent with the electron-positron data and that it significantly constrains the gluon FF. We verify the reliability of our results upon our choice of the kinematic cut in the hadron transverse momentum applied to the hadron-collider data and their consistency with NNFF1.0, our previous determination of the FFs of charged pions, kaons, and protons/antiprotons.


Towards small-x resummed parton distribution functions

Proceedings of Science 2017-April (2017)

L Rottoli, M Bonvini

© 2017 Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). We present preliminary results for fits of parton distribution functions (PDFs) which include the resummation of small-x logarithms at NLLx accuracy, performed in the NNPDF framework. We observe an improvement in the description of DIS data at small values of Bjorken x when resummation effects are included. The improvement is more marked when comparing NNLO+NLLx fits to NNLO ones, and is particularly noticeable for small-x and small-Q 2 HERA inclusive structure functions. The main effect of the resummation is an enhancement of the gluon and singlet PDFs at small-x, which persists at high scales.


Parton distributions from high-precision collider data

EUROPEAN PHYSICAL JOURNAL C 77 (2017) ARTN 663

RD Ball, V Bertone, S Carrazza, L Del Debbio, S Forte, P Groth-Merrild, A Guffanti, NP Hartland, Z Kassabov, JI Latorre, ER Nocera, J Rojo, L Rottoli, E Slade, M Ubiali, NNPDF Collaboration


Pseudo-scalar Higgs boson production at (NLOA)-L-3+(NLL)-L-3 '

EUROPEAN PHYSICAL JOURNAL C 76 (2016) ARTN 663

T Ahmed, M Bonvini, MC Kumar, P Mathews, N Rana, V Ravindran, L Rottoli


On the Higgs cross section at (NLO)-L-3+(NLL)-L-3 and its uncertainty

JOURNAL OF HIGH ENERGY PHYSICS (2016) ARTN 105

M Bonvini, S Marzani, C Muselli, L Rottoli


The prompt atmospheric neutrino flux in the light of LHCb

JOURNAL OF HIGH ENERGY PHYSICS (2016) ARTN 130

R Gauld, J Rojo, L Rottoli, S Sarkar, J Talbert


Intrinsic charm in a matched general-mass scheme

PHYSICS LETTERS B 754 (2016) 49-58

RD Ball, V Bertone, M Bonvini, S Forte, PG Merrild, J Rojo, L Rottoli


A determination of the charm content of the proton

EUROPEAN PHYSICAL JOURNAL C 76 (2016) ARTN 647

RD Ball, V Bertone, M Bonvini, S Carrazza, S Forte, A Guffanti, NP Hartland, J Rojo, L Rottoli


Fitting EMC structure functions with intrinsic charm

Proceedings of Science 11-15-April-2016 (2016)

L Rottoli

A detailed study of the impact of the data collected by the European Muon Collaboration (EMC) on the parton distribution function (PDF) of the charm quark is presented. The analysis is performed in the NNPDF framework, and the charm PDF is freely parametrized on equal footing as light quark and gluon distributions. We find that variations in the treatment of EMC data do not modify the charm PDF and do not affect our previous conclusion on the presence of an intrinsic component in the charm PDF.


Towards parton distributions with fitted charm

NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS 270 (2016) 23-26

P Groth-Merrild, L Rottoli, NNPDF Collaboration


Three loop soft function for (NLL)-L-3 ' gluon fusion Higgs boson production in soft-collinear effective theory

PHYSICAL REVIEW D 91 (2015) ARTN 051301

M Bonvini, L Rottoli


Resummation prescriptions and ambiguities in SCET vs. direct QCD: Higgs production as a case study

JOURNAL OF HIGH ENERGY PHYSICS (2015) ARTN 046

M Bonvini, S Forte, G Ridolfi, L Rottoli


Charm in deep-inelastic scattering

JOURNAL OF HIGH ENERGY PHYSICS (2015) ARTN 122

RD Ball, M Bonvini, L Rottoli


Charm production in the forward region: constraints on the small-x gluon and backgrounds for neutrino astronomy

JOURNAL OF HIGH ENERGY PHYSICS (2015) ARTN 009

R Gauld, J Rojo, L Rottoli, J Talbert


Parton distributions with threshold resummation

JOURNAL OF HIGH ENERGY PHYSICS (2015) ARTN 191

M Bonvini, S Marzani, J Rojo, L Rottoli, M Ubiali, RD Ball, V Bertone, S Carrazza, NP Hartland


Constraints on the quartic Higgs self-coupling from double-Higgs production at future hadron colliders

ArXiv (0)

W Bizoń, U Haisch, L Rottoli

We study the indirect constraints on the quartic Higgs self-coupling that arise from double-Higgs production at future hadron colliders. To this purpose, we calculate the two-loop contributions to the $gg \to hh$ amplitudes that involve a modified $h^4$ vertex. Based on our results, we estimate the reach of a $pp$ collider operating at $27 \, {\rm TeV}$ and $100 \, {\rm TeV}$ centre-of-mass energy in constraining the cubic and quartic Higgs self-couplings by measurements of double-Higgs and triple-Higgs production in gluon-fusion.


Threshold resummation in SCET vs. direct QCD: a systematic comparison

ArXiv (0)

L Rottoli

We perform a systematic comparison of soft-gluon resummation in SCET and in a standard "direct" QCD (dQCD) approach, both from an analytical and a phenomenological point of view. In particular, we concentrate on Higgs boson production in gluon-gluon fusion at a hadron collider. Using specifically a saddle point argument, we arrive at a detailed understanding of the quantitative differences between these two approaches.

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