ALICE Preprints

Ostatnio dodane:
2022-06-29
04:55
 Upgrade of the ALICE experiment beyond LHC Run 3 / Colella, Domenico (INFN, Bari) The ALICE Collaboration completed the upgrade of the detector and is now commissioning for the beginning of the data taking during LHC Run 3. [...] arXiv:2206.13247. - 13 p. Fulltext

2022-06-09
09:44
 ${\rm f}_{0}(980)$ production in inelastic pp collisions at $\sqrt{s} = 5.02$ TeV / ALICE Collaboration, CERN /ALICE Collaboration ; ALICE The measurement of the production of ${\rm f}_{0}(980)$ in inelastic pp collisions at $\sqrt{s} = 5.02$ TeV is presented. This is the first reported measurement of inclusive ${\rm f}_{0}(980)$ production at LHC energies. [...] arXiv:2206.06216; CERN-EP-2022-126.- 2022 - 16 p. Draft (restricted): PDF; Fulltext: 2206.06216 - PDF; CERN-EP-2022-126 - PDF;

2022-06-07
09:28
 Anisotropic flow and flow fluctuations of identified hadrons in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV /ALICE Collaboration The first measurements of elliptic flow of $\pi^\pm$, ${\rm K}^\pm$, p+$\overline{\rm p}$, ${\rm K_{S}^0}$, $\Lambda$+$\overline{\Lambda}$, $\phi$, $\Xi^-$+$\Xi^+$, and $\Omega^-$+$\Omega^+$ using multiparticle cumulants in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV are presented. Results obtained with two- ($v_2\{2\}$) and four-particle cumulants ($v_2\{4\}$) are shown as a function of transverse momentum, $p_{\rm T}$, for various collision centrality intervals. [...] arXiv:2206.04587; CERN-EP-2022-122.- 2022 - 22 p. Draft (restricted): PDF; Fulltext: PDF;

2022-06-07
09:03
 Observation of flow angle and flow magnitude fluctuations in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV at the LHC /ALICE Collaboration ; ALICE This Letter reports on the first measurements of transverse momentum dependent flow angle $\Psi_n$ and flow magnitude $v_n$ fluctuations, determined using new four-particle correlators. The measurements are performed for various centralities in Pb-Pb collisions at a centre-of-mass energy of $\sqrt{s_{\rm NN}}$ = 5.02 TeV with ALICE at the LHC. [...] arXiv:2206.04574; CERN-EP-2022-121.- 2022 - 13 p. Draft (restricted): PDF; Fulltext: PDF;

2022-05-30
09:39
 Towards the understanding of the genuine three-body interaction for p$-$p$-$p and p$-$p$-\Lambda$ /ALICE Collaboration ; ALICE Three-body nuclear forces play an important role in the structure of nuclei and hypernuclei and are also incorporated in models to describe the dynamics of dense baryonic matter, such as in neutron stars. So far, only indirect measurements anchored to the binding energies of nuclei can be used to constrain the three-nucleon force, and if hyperons are considered, the scarce data on hypernuclei impose only weak constraints on the three-body forces. [...] arXiv:2206.03344; CERN-EP-2022-110.- 2022 - 20 p. Draft (restricted): PDF; Fulltext: PDF;

2022-05-30
09:32
 Closing in on critical net-baryon fluctuations at LHC energies: cumulants up to third order in Pb$-$Pb collisions /ALICE Collaboration Fluctuation measurements are important sources of information on the mechanism of particle production at LHC energies. This article reports the first experimental results on third-order cumulants of the net-proton distributions in Pb$-$Pb collisions at a center-of-mass energy $\sqrt{s_{\rm NN}} = 5.02$ TeV recorded by the ALICE detector. [...] arXiv:2206.03343; CERN-EP-2022-111.- 2022 - 14 p. Draft (restricted): PDF; Fulltext: PDF;

2022-05-26
04:43
 Jet substructure in pp collisions with ALICE / Lesser, Ezra (UC, Berkeley) Jet substructure observables have been used by experiments at the Large Hadron Collider (LHC) as instruments to search for new physics as well as to study perturbative and nonperturbative processes in quantum chromodynamics (QCD). [...] arXiv:2205.11583. - 4 p. Fulltext

2022-05-24
15:10
 Constraining the ${\rm\overline{K}N}$ coupled channel dynamics using femtoscopic correlations at the LHC / Collaboration, Alice /ALICE The interaction of ${\rm{K}^{-}}$ with protons is characterised by the presence of several coupled channels, systems like ${\rm \overline{K}^0}$n and ${\pi\Sigma}$ with a similar mass and the same quantum numbers as the ${\rm{K}^{-}}$ p state. The strengths of these couplings to the ${\rm{K}^{-}}$p system are of crucial importance for the understanding of the nature of the $\Lambda(1405)$ resonance and of the attractive ${\rm{K}^{-}}$ p strong interaction. [...] arXiv:2205.15176; CERN-EP-2022-107.- Geneva : CERN, 2022 - 21 p. Draft (restricted): PDF; Fulltext: PDF;

2022-05-23
12:48
 First measurement of $\rm \Omega_c^0$ production in pp collisions at $\sqrt{s}=13$ TeV / ALICE Collaboration, CERN /ALICE Collaboration ; ALICE The inclusive production of the charm–strange baryon $\Omega^{0}_{\rm c}$ is measured for the first time via its hadronic decay into $\Omega-\pi^+$ at midrapidity ($|y| <$ 0.5) in proton–proton (pp) collisions at the centre-of-mass energy $\sqrt{s}$ = 13 TeV with the ALICE detector at the LHC. The transverse momentum ($p_{\rm T}$) differential cross section multiplied by the branching ratio is presented in the interval 2 < $p_{\rm T}$ < 12 GeV/$c$. [...] arXiv:2205.13993; CERN-EP-2022-106.- 2022 - 11 p. Draft (restricted): PDF; Fulltext: PDF;

2022-05-19
15:50
 $\Sigma(1385)^{\pm}$ resonance production inPb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}= 5.02$ TeV / ALICE Collaboration, CERN /ALICE Hadronic resonances are used to probe the hadron gas produced in the late stage of heavy-ion collisions since they decay on the same timescale, of the order of 1 to 10 fm/$c$, as the decoupling time of the system. In the hadron gas, (pseudo)elastic scatterings among the products of resonances that decayed before the kinetic freeze-out and regeneration processes counteract each other, the net effect depending on the resonance lifetime, the duration of the hadronic phase, and the hadronic cross sections at play. [...] arXiv:2205.13998; CERN-EP-2022-104.- Geneva : CERN, 2022 - 13 p. Draft (restricted): PDF; Fulltext: PDF;