A comparative measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi>ϕ</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>K</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.gif" overflow="scroll"><mml:mi>ϕ</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>μ</mml:mi><mml:mo>−</

Arnaldi, R.; Castor, J.; Chaurand, B.; Chen, W.; Cicalò, C.; Colla, A.; Cortese, P.; Damjanović, S.; David, A.; Falco, A. De; Devaux, A.; Ducroux, L.; En’yo, H.; Fargeix, J.; Ferretti, A.; Floris, M.; Förster, A.; Force, P.; Guettet, N.; Guichard, A.; Gulkanian, H.; Heuser, J. M.; Keil, M.; Li, Z.; Lourenço, C.; Lozano, J.; Manso, F.; Martins, P.; Masoni, A.; Neves, A.; Ohnìshì, H.; Oppedisano, C.; Parracho, P. G. Ferreira; Pillot, P.; Poghosyan, T.; Puddu, G.; Radermacher, E.; Ramalhete, P.; Rosinský, P.; Scomparin, E.; Seixas, J.; Serci, S.; Sonderegger, P.; Specht, H. J.; Tieulent, R.; Uras, A.; Usai, G. L.; Veenhof, R.; Wöhri, H. K.

doi:10.1016/j.physletb.2011.04.028

Cited by 8 publications

(5 citation statements)

References 20 publications

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“…The p T spectrum of φ(1020) measured in the e + e − decay channel is in agreement with that from the hadronic decay within the statistical and systematical uncertainties. Similar results have been observed in the dimuon decay channel at SPS energies [24].…”

Section: Comparison To Hadronic Decay Channelsupporting

confidence: 88%

The $ϕ(1020)\rightarrow e^{+}e^{-}$ meson decay measured with the STAR experiment in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV

Adamczyk,

Adkins,

Agakishiev

et al. 2015

Preprint

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We report the measurement of the leptonic (e + e − ) decay channel of the φ(1020) meson in Au+Au collisions at √ s N N = 200 GeV by the STAR experiment.The transverse momentum (p T ) spectrum is measured for 0.1 ≤ p T ≤ 2.5 GeV/c at mid-rapidity (|y| ≤ 1). We obtain the p T -integrated φ(1020) mass M φ = 1017.7 ± 0.8(stat.)±0.9(sys.) MeV/c 2 and width Γ φ = 8.0±2.5(stat.)±2.3(sys.) MeV/c 2 , which are within 1.5 σ and 1.1 σ of the vacuum values, respectively. No significant difference is observed in the measured p T spectrum, dN/dy, or p T of the φ(1020) meson between the e + e − and hadronic (K + K − ) decay channels as measured by the same experiment. The experimental results are compared to a theoretical model including medium-modified φ(1020).

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Section: Comparison To Hadronic Decay Channelsupporting

confidence: 88%

The $ϕ(1020)\rightarrow e^{+}e^{-}$ meson decay measured with the STAR experiment in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV

Adamczyk,

Adkins,

Agakishiev

et al. 2015

Preprint

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“…Differences in the results due to the choice of the t function contribute to the systematic uncertainty. More details are reported in [14]. For the φ peak, a parametrization obtained from a t to the mass distribution obtained from an overlay simulation of the signal is used.…”

Section: Analysis In the Kaon Channelmentioning

confidence: 99%

“…The acceptance multiplied by the reconstruction efficiency for p T > 0.9 GeV/c is about 15% in full rapidity, and almost at as a function of p T (more details are reported in [14]). Due to the limited statistics transverse mass distributions are extracted for central and semi-central collisions only ( N part = 177 and 133, respectively).…”

Section: Analysis In the Kaon Channelmentioning

confidence: 99%

“…However, CERES' measurement of the T eff parameter in the dileptonic channel is affected by a large statistical uncertainty that does not allow to draw rm conclusions. Thanks to its muon spectrometer and vertex tracker, that will be described below, NA60 could access both the μ + μ − [13] and K + K − [14] channels, and thus study the possible existence of a "φ puzzle" in In-In collisions.…”

Section: Introductionmentioning

confidence: 99%

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Resonances production from the NA60 experiment

Falco

2012

EPJ Web of Conferences

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Abstract. The NA60 experiment at the CERN SPS has studied light vector meson production in In-In collisions at 158A GeV. The φ meson was detected via both the K + K − and the μ + μ − decay channels. The yields and inverse slope parameters of the m T spectra observed in the two channels are compatible within errors, different from the large discrepancies seen in Pb-Pb collisions between the hadronic (NA49) and dimuon (NA50) decay channels. In the invariant mass region 0.2 < M μμ < 2.6 GeV, a strong excess of pairs above the sources that describe the mass spectrum in p-A collisions is observed. The mass spectrum for M μμ < 1 GeV is consistent with a dominant contribution from the pion annihilation process π + π → ρ → μ + μ − . For M μμ > 1 GeV, the excess is found to be prompt, with remarkable differences with respect to the Drell-Yan process. The T eff slope parameter, extracted from the transverse mass spectra, shows a rise with mass up to the ρ, followed by a sudden decline for higher masses. The former is consistent with radial ow of a hadronic source, while the latter suggests a dominantly partonic emission source.

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“…f-mesons [10] do not rescatter significantly in the subsequent expanding hadronic phase. On the other hand, at hadronization, quarks always interact strongly with each other [11][12][13][14]. This shows that they have a long lifetime, (46.3±0.4) fm c −1 .…”

Section: Introductionmentioning

confidence: 99%

Study of K*(892)⁰ and ϕ (1020) meson production in proton–proton and Pb–Pb collisions at sNN = 2.76 TeV

Ali¹,

Ahmed²,

Arif³

et al. 2021

Commun. Theor. Phys.

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In this paper, we describe a study of charged particle yield as a function of p T for K *(892)0 and ϕ (1020) mesons in proton–proton (pp) and Pb–Pb collisions at s N N = 2.76 TeV in the central rapidity region of ∣y∣ < 0.5, in a p T range of 0 < p T < 15 GeV c −1 in pp collisions and in a p T range of 0 < p T < 20 GeV c −1 in Pb-Pb collisions. We also investigated a very important ratio, the nuclear modification factor, to study the effects of the medium in the most central region, i.e. 0%–5% centrality. For data simulation, we used the EPOS-LHC and EPOS-1.99 models. To check the validity of these models’ simulations, we compared the data obtained from these Monte Carlo simulation programs with ALICE experimental data for s N N = 2.76 TeV. It was concluded that the models’ predictions for the ϕ-meson in pp and for the most central Pb-Pb collisions disagreed with the ALICE data, and that the difference increased with p T . This may be connected with the essential role of collective parton behaviors which could not have been taken into account by the models. For K *0 mesons, both programs gave almost the same predictions, and with p T in the interval p T > 3 GeV c −1, the predictions were very close to the experimental data. Both models gave higher predictions for the soft p T interval and lower predictions for the hard interactions. The values of the R AA distributions were lower than unity and both models were very close to the ALICE data. It is very interesting that the models were not able to describe the p T distributions, but they gave good predictions for their ratios. This may possibly be due to parton collective behaviors. We observed some additional suppression of K ∗0 at low values of p T with respect to ϕ-mesons, which may be related to the role of the masses of the particles in soft interactions. The rising trend for R AA in the region from p T = 10 GeV c −1 to 20 GeV c −1 observed by the ALICE experiment was absent for the ϕ-mesons.

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A comparative measurement of ϕ→K+K− and ϕ→μ+μ−

Cited by 8 publications

References 20 publications

The $ϕ(1020)\rightarrow e^{+}e^{-}$ meson decay measured with the STAR experiment in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV

The $ϕ(1020)\rightarrow e^{+}e^{-}$ meson decay measured with the STAR experiment in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV

Resonances production from the NA60 experiment

Study of K*(892)⁰ and ϕ (1020) meson production in proton–proton and Pb–Pb collisions at sNN = 2.76 TeV

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A comparative measurement of ϕ→K+K− and ϕ→μ+μ−

Cited by 8 publications

References 20 publications

The $ϕ(1020)\rightarrow e^{+}e^{-}$ meson decay measured with the STAR experiment in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV

The $ϕ(1020)\rightarrow e^{+}e^{-}$ meson decay measured with the STAR experiment in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV

Resonances production from the NA60 experiment

Study of K*(892)0 and ϕ (1020) meson production in proton–proton and Pb–Pb collisions at sNN = 2.76 TeV

Contact Info

Product

Resources

About

Study of K*(892)⁰ and ϕ (1020) meson production in proton–proton and Pb–Pb collisions at sNN = 2.76 TeV