Novel Mechanism of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>H</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>Dibaryon Production in Proton-Proton Interactions from Parton-Based Gribov-Regge Theory

Bleicher, Marcus; Fm, Liu; Aichelin, J.; Hj, Drescher; Ostapchenko, S.; Pierog, T.; Werner, K.

doi:10.1103/physrevlett.92.072301

Cited by 5 publications

(3 citation statements)

References 33 publications

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“…to arrive on Earth or other place of the Galaxy. These results appeared to be in accordance with terrestrial experiments at RHIC which have not confirmed the existence of the SQM nor proved that it does not exists [60][61][62].…”

Section: Final Remarkssupporting

confidence: 65%

On the anomalous mass defect of strange stars in the Field Correlator Method

Pereira

2016

Nuclear Physics A

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We investigate general aspects of the mass defects of strange stars in the context of the Field Correlator Method, without magnetic field. The main parameters of the model that enter the corresponding nonperturbative equation of state of the quark gluon plasma are the gluon condensate G 2 and the large distance static QQ potential V 1 .We calculate mass defects of stellar configurations in the central density range 11 < log ρ c < 18. In general, the mass defects are strongly dependent on the model parameters. For a large range of values of G 2 and V 1 , we obtain anomalous mass defects with magnitudes around 10 53 erg , of the same order of the observed energies of gamma-ray bursts and neutrino emissions in SN1987A, and of the theoretically predicted energies of the quark-novae explosions.

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Section: Final Remarkssupporting

confidence: 65%

On the anomalous mass defect of strange stars in the Field Correlator Method

Pereira

2016

Nuclear Physics A

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“…Generally speaking, our results appear to be consistent with the fact that absolutely stable SQM has not been observed up to the present. The experiment with STAR at RHIC has not confirmed the existence of SQM nor proved that it does not exist [48][49][50]. The low values of G 2 with respect to the ones in [36,37] would provide a possible explanation for the absence of absolutely stable SQM signature.…”

Section: Final Remarks and Conclusionmentioning

confidence: 99%

SQM studied in the Field Correlator Method

Pereira

2013

Nuclear Physics A

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By using the recent nonperturbative equation of state of the quark gluon plasma derived in the formalism of the Field Correlator Method, we investigate the bulk properties of the strange quark matter in beta-equilibrium and with charge neutrality at T=p=0. The results show that the stability of strange quark matter with respect to $^{56}Fe$ is strongly dependent on the model parameters, namely, the gluon condensate $G_2$ and the q$\bar{\rm q}$ interaction potential $V_1$. A remarkable result is that the width of the stability window decreases as $V_1$ increases, being maximum at $V_1=0$ and nearly zero at $V_1=0.5$ GeV. For $V_1$ in the range $0\leq V_1\leq0.5$ GeV, all values of $G_2$ are lower than $0.006-0.007\;{\rm GeV}^4$ obtained from comparison with lattice results at $T_c\;(\mu=0)\sim170$ MeV. These results do not favor the possibilities for the existence of (either nonnegative or negative) absolutely stable strange quark matter

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“…It is therefore treated the same way as all the other hadrons. A similar approach was recently introduced to study H 0 production in pp interactions [26].…”

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confidence: 99%

Production of Θ+(1540) and Ξ pentaquark states in proton–proton interactions

et al. 2004

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The production of strange pentaquark states (e.g. Theta baryons and Ξ −− states) in hadronic interactions within a Gribov-Regge approach is explored. In this approach the Θ + (1540) and the Ξ are produced by disintegration of remnants formed by the exchange of pomerons between the two protons. We predict the rapidity and transverse momentum distributions as well as the 4π multiplicity of the Θ + , Ξ −− , Ξ − , Ξ 0 and Ξ + for √ s = 17 GeV (SPS) and 200 GeV (RHIC). For both energies more than 10 −3 Θ + and more than 10 −5 Ξ per pp event should be observed by the present experiments.Very recently in photon-nucleus [1,2] and Kaon-nucleus experiments [3] a new baryon, consisting of five quarks, uudds, has been identified in the K + n or K 0 p invariant mass spectrum. It has been been named Θ + particle and has spin 1/2, isospin 0 and strangeness +1. Its mass is about 1.54 GeV and its width is less than 25 MeV. Such a state has been predicted by Diakonov [4] in the framework of a chiral soliton model. This finding has renewed the experimental and theoretical interest for novel baryon states. Major progress has been reported on a possible extension of the original model [5,6], within the Skyrme model [7][8][9], and within the constituent quark model [10,11]. Also (lattice) QCD studies of the Θ + (see e.g. [12][13][14]) have been performed and first explorations of the Θ + multiplicity at SPS and RHIC energies are available [15][16][17]. Thus, the existence of this novel state has many perspectives for pp as well as for nucleus-nucleus collisions.In this letter, we present predictions for the Θ + in pp collisions from a newly developed approach for hadronic interactions. It has recently been shown [18] that the standard string fragmentation models which described spectra and multiplicities of many hadrons rather well need to be revised: due to their diquark-quark topology these models produce more Ω than Ω in medium and low energetic pp interactions, in contradistinction to experiments. Therefore a key issue is presently to gain information on the details of hadron production. Espe- * Alexander von Humboldt Fellow cially more exotic states like the Λ(1405) which may be a udsuu state or the Θ + carry important information to tackle this question. If their multiplicity can be related to that of other particles one can hope to get experimentally a handle on the hadronization process.In heavy ion collisions the multiplicity of the most abundant particles can be well described in a statistical model assuming a temperature close to that where the chiral/confinement phase transition is expected and a moderate chemical potential. Unstable particles can test how the expanding system interacts afterwards because if the decay products have still an interaction in the invariant mass spectra the resonance cannot be identified anymore. Especially long living states are very useful in this respect.Until this year, the search for multi-quark bags focused mainly on the H-particle [19], because it is closely related to the study of Ξ an...

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Novel Mechanism ofH0Dibaryon Production in Proton-Proton Interactions from Parton-Based Gribov-Regge Theory

Cited by 5 publications

References 33 publications

On the anomalous mass defect of strange stars in the Field Correlator Method

On the anomalous mass defect of strange stars in the Field Correlator Method

SQM studied in the Field Correlator Method

Production of Θ+(1540) and Ξ pentaquark states in proton–proton interactions

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