Physics Beyond Colliders: QCD Working Group Report

Dainese, A.; Diehl, M.; Di Nezza, P.; Friedrich, J.; Gaździcki, M.; Graziani, G.; Hadjidakis, C.; Jäckel, J.; Lansberg, J. P.; Magnon, A.; Mallot, G.; Vidal, F. Martinez; Massacrier, L. M.; Nemenov, L.; Neri, N.; Pawlowski, J. M.; Puławski, S. M.; Schacher, J.; Schnell, G.; Stocchi, A.; Usai, G. L.; Vallée, C.; Venanzoni, G.

doi:10.48550/arxiv.1901.04482

Cited by 7 publications

(11 citation statements)

References 95 publications

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“…NICA MPD [19], J-PARC HI [20], and STAR's Fixed-Target (FXT) program [68], see also [22][23][24]. Our results therefore provide a strong motivation for CEP searches at these future experiments.…”

Section: Introductionmentioning

confidence: 71%

“…Note that the hats indicate that this relation holds on the level of the fluctuation fields in the path integral. We also emphasise that our example (22) has an overlap with the first term in the dynamical hadronisation flow (15) with Ȧk = −∂ t D k , but is not identical: q q = qq + G qq [Φ]. Importantly, the linear term − x c σ σ in the effective action (17) is in one to one correspondence to the quark (current) mass term in the classical action, S QCD ∝ m 0 q q q.…”

Section: A Qcd With Dynamical Hadronisationmentioning

confidence: 98%

“…This will be extended in BES phase II. Experimental studies of the QCD phase structure are also planned or run at other facilities with different collision energies and luminosities, such as CBM at FAIR [16] and HADES at GSI [17] in Germany, NA61/SHINE at CERN [18], the NICA/MPD in Russia [19], J-PARC-HI in Japan [20], and HIAF in China [21], see also [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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QCD phase structure at finite temperature and density

2020

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We discuss the phase structure of QCD for N f = 2 and N f = 2 + 1 dynamical quark flavours at finite temperature and baryon chemical potential. It emerges dynamically from the underlying fundamental interactions between quarks and gluons in our work. To this end, starting from the perturbative high-energy regime, we systematically integrate-out quantum fluctuations towards low energies by using the functional renormalisation group. By dynamically hadronising the dominant interaction channels responsible for the formation of light mesons and quark condensates, we are able to extract the phase diagram for µB/T 6. We find a critical endpoint at (TCEP, µB CEP ) = (107, 635) MeV. The curvature of the phase boundary at small chemical potential is κ = 0.0142(2), computed from the renormalised light chiral condensate ∆ l,R . Furthermore, we find indications for an inhomogeneous regime in the vicinity and above the chiral transition for µB 417 MeV. Where applicable, our results are in very good agreement with the most recent lattice results. We also compare to results from other functional methods and phenomenological freeze-out data. This indicates that a consistent picture of the phase structure at finite baryon chemical potential is beginning to emerge. The systematic uncertainty of our results grows large in the density regime around the critical endpoint and we discuss necessary improvements of our current approximation towards a quantitatively precise determination of QCD phase diagram.

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Section: Introductionmentioning

confidence: 71%

Section: A Qcd With Dynamical Hadronisationmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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QCD phase structure at finite temperature and density

2020

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“…Until now, the LHCb-SMOG statistical samples for J/ψ taken with different noble gases (He, Ar, Ne) remain too small -on the order of hundreds-to expect any η c counts. The situation could significantly get better in the future with proposed SMOG2 system [55,56] with achievable yearly luminosities on the order of 10 pb −1 during the LHC Run3. It is however crucial to further constrain NRQCD LDMEs -as we propose here-to have a H target available as opposed as to nuclear -noble gas-targets.…”

Section: Results For the Fixed-target Mode Atmentioning

confidence: 99%

Phenomenological NLO analysis of η production at the LHC in the collider and fixed-target modes

Feng

Lansberg

et al. 2019

Nuclear Physics B

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In view of the good agreement between the LHCb prompt-η c data at √ s = 7 and 8 TeV and the NLO colour-singlet model predictions -i.e. the leading v 2 NRQCD contribution-, we provide predictions in the LHCb acceptance for the forthcoming 13 TeV analysis bearing on data taken during the LHC Run2. We also provide predictions for √ s = 115 GeV for proton-hydrogen collisions in the fixed-target mode which could be studied during the LHC Run3. Our predictions are complemented by a full theoretical uncertainty analysis. In addition to cross section predictions, we elaborate on the uncertainties on the pp branching ratio -necessary for data-theory comparisonand discuss other usable branching fractions for future studies.

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“…Understanding this part of the phase structure, including the location and dynamics of a potential critical end point (CEP), plays a pivotal role in understanding phases of strongly interacting nuclear matter under extreme conditions. For works on the phase structure of QCD, covering experiment and theory see, e.g., [1][2][3][4][5][6][7][8][9][10][11][12][13], where theory covers first principles functional approaches and lattice simulations.…”

Section: Introductionmentioning

confidence: 99%

Hyper-order baryon number fluctuations at finite temperature and density

Fu,

Luo,

Pawlowski

et al. 2021

Preprint

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Physics Beyond Colliders: QCD Working Group Report

Abstract: This report summarises the main findings of the QCD Working Group in the CERN Physics Beyond Colliders Study.

Cited by 7 publications

References 95 publications

QCD phase structure at finite temperature and density

QCD phase structure at finite temperature and density

Phenomenological NLO analysis of η production at the LHC in the collider and fixed-target modes

Hyper-order baryon number fluctuations at finite temperature and density

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