On the physics potential to study the gluon content of proton and deuteron at NICA SPD

Arbuzov, A. B.; Bacchetta, Alessandro; Butenschoen, Mathias; Celiberto, Francesco Giovanni; D’Alesio, U.; Deka, Mridupawan; Denisenko, I.; Echevarría, Miguel G.; Ефремов, А. В.; Ivanov, N. Ya.; Guskov, A.; Karpishkov, Anton; Klopot, Yaroslav; Kniehl, Bernd A.; Kotzinian, A.M.; Kumano, S.; Lansberg, Jean-Philippe; Liu, Keh-Fei; Murgia, F.; Nefedov, Maxim; Parsamyan, B.; Pisano, Cristian; Radici, Marco; Rymbekova, A.; Saleev, V. A.; Shipilova, A. V.; Song, Q. Q.; Teryaev, Oleg

doi:10.48550/arxiv.2011.15005

Cited by 2 publications

(3 citation statements)

References 246 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Its nominal √ s for 7 TeV proton beams reaches 114.6 GeV. Another possibility is the SPD detector at the NICA facility up to √ s = 27 GeV [99].…”

Section: A Digression On the η B Detectabilitymentioning

confidence: 99%

Curing the unphysical behaviour of NLO quarkonium production at the LHC and its relevance to constrain the gluon PDF at low scales

Lansberg,

Ozcelik

2020

Preprint

View full text Add to dashboard Cite

We address the unphysical energy dependence of quarkonium-hadroproduction cross sections at Next-to-Leading Order (NLO) in α s which we attribute to an oversubtraction in the factorisation of the collinear singularities inside the PDFs in the MS scheme. Such over-or undersubtractions have a limited phenomenological relevance in most of the scattering processes in particle physics. On the contrary, it is particularly harmful for P T -integrated charmonium hadroproduction which renders a wide class of NLO results essentially unusable. Indeed, in such processes, α s is not so small, the PDFs are not evolved much and can be rather flat for the corresponding momentum fractions and, finally, some process-dependent NLO pieces are either too small or too large. We propose a scale-fixing criterion which avoids such an over-subtraction. We demonstrate its efficiency for η c,b but also for a fictitious light elementary scalar boson. Having provided stable NLO predictions for η c,b P Tintegrated cross sections, σ NLO η Q , and discussed the options to study η b hadroproduction, we argue that their measurement at the LHC can help better determine the gluon PDF at low scales and tell whether the local minimum in conventional NLO gluon PDFs around x = 0.001 at scales below 2 GeV is physical or not.

show abstract

“…Its nominal √ s for 7 TeV proton beams reaches 114.6 GeV. Another possibility is the SPD detector at the NICA facility up to √ s = 27 GeV [99].…”

Section: A Digression On the η B Detectabilitymentioning

confidence: 99%

Curing the unphysical behaviour of NLO quarkonium production at the LHC and its relevance to constrain the gluon PDF at low scales

Lansberg,

Ozcelik

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…-The gluons represent off-toroidal (off-diagonal) degrees of freedom and as such contribute to shear stresses in the energymomentum tensor of the proton interior [33]. The offdiagonal generators E ij are related to the off-toroidal gluonic generators S k , M k from (7) thus…”

Section: Intrinsic Baryon Mass -We Shall Use the Followingmentioning

confidence: 99%

“…This is a field of current interest with analyses of charged particle multiplicities in scattering experiments [2][3][4] and theoretical predictions of shear stress transverse distributions from form factors based on QCD [5] and chiral quark soliton models [6]. Confer [7] for a future prospect and [8] for an exemplar model assuming specific internal proton structure. Also hot spot models look promising for data analysis [9].…”

mentioning

confidence: 99%

Transverse proton gluon anisotropy points behind the Standard Model

Trinhammer

2023

EPL

View full text Add to dashboard Cite

The present work focuses on transverse gluon densities in the proton and derives exemplar distributions showing azimuthal anisotropies. Such anomalies relative to the Standard Model may be visible in scattering experiments involving protons. I describe baryons as mass eigenstates of a Hamiltonian structure on an intrinsic U(3) conﬁguration space. This has yielded the neutral ﬂavour baryon spectrum and given a rather accurate value for the neutron mass 939.9(5) MeV from ﬁrst principles. Quark and gluon ﬁelds are shaped by the momentum form of the intrinsic wavefunction. This has led to parton distribution functions for the u and d valence quarks for the proton and to a proton spin structure function agreeing with experiments over four orders of magnitude in the parton momentum fraction.

show abstract

On the physics potential to study the gluon content of proton and deuteron at NICA SPD

Cited by 2 publications

References 246 publications

Curing the unphysical behaviour of NLO quarkonium production at the LHC and its relevance to constrain the gluon PDF at low scales

Curing the unphysical behaviour of NLO quarkonium production at the LHC and its relevance to constrain the gluon PDF at low scales

Transverse proton gluon anisotropy points behind the Standard Model

Contact Info

Product

Resources

About