Interacting hadron resonance gas model in the 
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-matrix formalism

Dash, Ashutosh; Samanta, Subhasis; Mohanty, B.

doi:10.1103/physrevc.97.055208

Cited by 31 publications

(20 citation statements)

References 95 publications

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“…This is due to the fact that non-resonant background was not considered in the K-matrix parametrization of Ref. [44]. In fact, it is known that a more sophisticated treatment of the K-matrix, e.g., maintaining the exchange symmetry and unitarity, is required to produce reliable results on phase shifts and scattering amplitudes [45,46].…”

Section: The Pressure Of Strange Baryonsmentioning

confidence: 99%

Thermodynamics of the strange baryon system from a coupled-channels analysis and missing states

Fernández-Ramírez

Petreczky

2018

Phys. Rev. C

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We study the thermodynamics of the strange baryon system by using an S-matrix formulation of statistical mechanics. For this purpose, we employ an existing coupled-channel study involvinḡ KN , πΛ, and πΣ interactions in the S = −1 sector. A novel method is proposed to extract an effective phase shift due to the interaction, which can subsequently be used to compute various thermal observables via a relativistic virial expansion. Using the phase shift extracted, we compute the correlation of the net baryon number with strangeness (χBS) for an interacting hadron gas. We show that the S-matrix approach, which entails a consistent treatment of resonances and naturally incorporates the additional hyperon states which are not listed by the Particle Data Group, leads to an improved description of the lattice data over the hadron resonance gas model.

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Section: The Pressure Of Strange Baryonsmentioning

confidence: 99%

Thermodynamics of the strange baryon system from a coupled-channels analysis and missing states

Fernández-Ramírez

Petreczky

2018

Phys. Rev. C

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“…It is to be noted that the K-matrix formalism we use lacks repulsive interactions. Recently, the K-matrix formalism has been extended to include attractive as well as repulsive interactions [120,121]. So it is possible to improve current work to include the repulsive interactions as well.…”

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confidence: 99%

Estimating transport coefficients of interacting pion gas with K-matrix cross sections

Kadam¹,

Pawar²,

Mishra³

2018

J. Phys. G: Nucl. Part. Phys.

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We estimate the transport coefficients, viz., shear and bulk viscosities as well as thermal and electrical conductivities, of hot pionic matter using relativistic Boltzmann equation in relaxation time approximation. We use K-matrix parametrization of pion-pion cross sections to estimate the transport coefficients which incorporate multiple heavy resonances while simultaneously preserving the unitarity of S-matrix. We compare transport coefficients estimated using K-matrix parametrization with existing literature on pionic transport coefficients. We find that the K-matrix scheme estimations are in reasonable agreement with previous results.

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“…[8] the K-matrix formalism was used to study an interacting gas of hadrons and it was extended further in Ref. [9].…”

Section: Attractive Interaction Using K-matrix Formalismmentioning

confidence: 99%

Thermodynamics and Fluctuations-Correlations of Conserved Charges in a Hadron Resonance Gas Model with Attractive and Repulsive Interaction within S-Matrix Formalism

Dash¹,

Mohanty²,

Samanta³

2019

Hot Quarks 2018—Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus-Nucleus Collisions

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We have extended the hadron resonance gas (HRG) model by including the effect of both attractive and repulsive interaction in the scattering matrix (S-matrix) formalism. The attractive part of the interaction is calculated using K-matrix formalism while the repulsive part is included by fitting to experimental phase shifts. We have calculated various thermodynamics quantities like pressure, energy density, entropy density etc. A good agreement between our calculations and the hadronic phase of the lattice QCD (LQCD) simulations is observed. We have also calculated fluctuations and correlations for various conserved charges like baryon, strangeness and electric charge. In the present model, χ B 2 , χ B S 11 and C B S agree well with the LQCD data.

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Interacting hadron resonance gas model in the K -matrix formalism

Cited by 31 publications

References 95 publications

Thermodynamics of the strange baryon system from a coupled-channels analysis and missing states

Thermodynamics of the strange baryon system from a coupled-channels analysis and missing states

Estimating transport coefficients of interacting pion gas with K-matrix cross sections

Thermodynamics and Fluctuations-Correlations of Conserved Charges in a Hadron Resonance Gas Model with Attractive and Repulsive Interaction within S-Matrix Formalism

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