In this contribution the role of strangeness in astrophysics is discussed and, more precisely, strange hadronic matter in the interior of neutron stars. A special attention is payed to certain phenomena involving strange hadronic matter, such as the hyperon puzzle, kaon condensation and the thermal behaviour of hyperons in neutron star mergers.
{"title":"Strangeness in Astrophysics","authors":"Laura Tolos","doi":"arxiv-2409.06461","DOIUrl":"https://doi.org/arxiv-2409.06461","url":null,"abstract":"In this contribution the role of strangeness in astrophysics is discussed\u0000and, more precisely, strange hadronic matter in the interior of neutron stars.\u0000A special attention is payed to certain phenomena involving strange hadronic\u0000matter, such as the hyperon puzzle, kaon condensation and the thermal behaviour\u0000of hyperons in neutron star mergers.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Quantum computing has been increasingly applied in nuclear physics. In this work, we combine quantum computing with the complex scaling method to address the resonance problem. Due to the non-Hermiticity introduced by complex scaling, standard quantum computing cannot solve for complex eigenvalues directly. Therefore, it is necessary to embed the non-Hermitian operator into a larger dimensional unitary operator. Additionally, for the case of two basis vectors, we improve the traditional direct measurement method and optimize the quantum circuit. Ultimately, using the $alpha+alpha$ system as an example, we obtain the complex eigenenergies from the quantum computer that are consistent with those obtained from direct Hamiltonian diagonalization.
{"title":"Quantum computing for extracting nuclear resonances","authors":"Hantao Zhang, Dong Bai, Zhongzhou Ren","doi":"arxiv-2409.06340","DOIUrl":"https://doi.org/arxiv-2409.06340","url":null,"abstract":"Quantum computing has been increasingly applied in nuclear physics. In this\u0000work, we combine quantum computing with the complex scaling method to address\u0000the resonance problem. Due to the non-Hermiticity introduced by complex\u0000scaling, standard quantum computing cannot solve for complex eigenvalues\u0000directly. Therefore, it is necessary to embed the non-Hermitian operator into a\u0000larger dimensional unitary operator. Additionally, for the case of two basis\u0000vectors, we improve the traditional direct measurement method and optimize the\u0000quantum circuit. Ultimately, using the $alpha+alpha$ system as an example, we\u0000obtain the complex eigenenergies from the quantum computer that are consistent\u0000with those obtained from direct Hamiltonian diagonalization.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Quantum computers are promising tools for the simulation of many-body systems, and among those, QCD stands out by its rich phenomenology. Every simulation starts with a codification, and here we succently review a newly developed compact encoding based on the identification between registers and particles; the quantum memory is divided into registers, and to each we associate a Hilbert space of dimension the number of degrees of freedom of the codified particles. In this way we gain an exponential compression over direct encodings for a low number of particles with many degrees of freedom. As an example we apply this encoding on a two-register memory and implement antisymmetrization and exponentiation algorithms.
{"title":"Towards few-body QCD on a quantum computer","authors":"J. J. Galvez-Viruet","doi":"arxiv-2409.06403","DOIUrl":"https://doi.org/arxiv-2409.06403","url":null,"abstract":"Quantum computers are promising tools for the simulation of many-body\u0000systems, and among those, QCD stands out by its rich phenomenology. Every\u0000simulation starts with a codification, and here we succently review a newly\u0000developed compact encoding based on the identification between registers and\u0000particles; the quantum memory is divided into registers, and to each we\u0000associate a Hilbert space of dimension the number of degrees of freedom of the\u0000codified particles. In this way we gain an exponential compression over direct\u0000encodings for a low number of particles with many degrees of freedom. As an\u0000example we apply this encoding on a two-register memory and implement\u0000antisymmetrization and exponentiation algorithms.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A recent analysis of the LHCb data [Phys. Rev. D 105 (2022) L031503] obtained a sizable negative effective range for the $X(3872)$. This has attracted intensive discussions on whether $X(3872)$ can be deemed as a $Dbar{D}^*$ molecular state. This work explicitly demonstrates that the negative effective range of the $X(3872)$ does not contradict the molecular picture, adopting an effective field theory formulation of the $Dbar{D}^*$ interaction that can simultaneously reproduce the binding energy and effective range of the $X(3872)$. We elaborate on the implications of the large negative effective range of $X(3872)$ and the small binding energy on the underlying $Dbar{D}^*$ interaction. Such results are relevant for a better understanding of hadronic molecules and their binding mechanism.
最近对LHCb数据的分析[Phys. Rev. D 105 (2022) L031503]得到了$X(3872)$的一个相当大的负有效范围。这引起了关于$X(3872)$是否可以被视为$Dbar{D}^*$分子态的激烈讨论。这项工作明确地证明了$X(3872)$的负效应范围与分子图景并不矛盾，它采用了$Dbar{D}^*$相互作用的效应场理论公式，可以同时再现$X(3872)$的结合能和有效范围。我们详细阐述了$X(3872)$的负效应范围大和结合能小对底层$Dbar{D}^*$ 相互作用的影响。这些结果对于更好地理解强子分子及其结合机制具有重要意义。
{"title":"Implication of a negative effective range on the $Dbar{D}^*$ interaction and the nature of $X(3872)$","authors":"Yi-Bo Shen, Ming-Zhu Liu, Zhi-Wei Liu, Li-Sheng Geng","doi":"arxiv-2409.06409","DOIUrl":"https://doi.org/arxiv-2409.06409","url":null,"abstract":"A recent analysis of the LHCb data [Phys. Rev. D 105 (2022) L031503] obtained\u0000a sizable negative effective range for the $X(3872)$. This has attracted\u0000intensive discussions on whether $X(3872)$ can be deemed as a $Dbar{D}^*$\u0000molecular state. This work explicitly demonstrates that the negative effective\u0000range of the $X(3872)$ does not contradict the molecular picture, adopting an\u0000effective field theory formulation of the $Dbar{D}^*$ interaction that can\u0000simultaneously reproduce the binding energy and effective range of the\u0000$X(3872)$. We elaborate on the implications of the large negative effective\u0000range of $X(3872)$ and the small binding energy on the underlying $Dbar{D}^*$\u0000interaction. Such results are relevant for a better understanding of hadronic\u0000molecules and their binding mechanism.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chun Yuen Tsang, Rongrong Ma, Prithwish Tribedy, Zhangbu Xu
In the constituent quark model, each valence quark inside a baryon carries 1/3 unit of the baryon number. An alternative picture exists where the center of a Y-shaped topology of gluon fields, called the baryon junction, carries a unit baryon number. Studying baryon transport over a large rapidity gap ($delta y$) in nuclear collisions provides a possible tool to distinguish these two pictures. A recent analysis of global data on net-proton yield at mid-rapidity in Au+Au collisions showed an exponential dependence on $delta y$ and the exponential slope does not vary with event centrality, favoring the baryon junction picture. Since junctions are flavor blind, hyperons -- baryons containing valence strange quarks -- are expected to exhibit a similar behavior as the proton. This study aims to test this prediction by analyzing hyperon yields in Au+Au collisions at various energies. We observe that net-hyperon yields, after correcting for the strangeness production suppression, adhere to the expected exponential form. The extracted slope parameters for net-$Lambda$, net-$Xi$ and net-$Omega$ are consistent with each other and with those of net-proton within uncertainties, and exhibit no centrality dependence, further substantiating the baryon junction picture. Various implementations of the PYTHIA event generator, primarily based on valence quarks for baryon transport, are unable to simultaneously describe the slope parameters for all baryons.
在组成夸克模型中，重子内部的每个价夸克都携带 1/3 单位的重子数。另一种情况是，胶子场 Y 形拓扑结构的中心（称为重子交界处）携带一个单位的重子数。在核碰撞中研究重子在大的速隙（$delta y$）上的输运为区分这两种图景提供了一种可能的工具。最近对Au+Au碰撞中净质子产率的全局数据进行的分析表明，指数依赖于$delta y$，而且指数斜率不随事件中心性而变化，这有利于重子交界图景。由于结是味道盲的，超子--含有价奇异夸克的重子--预计会表现出与质子类似的行为。本研究旨在通过分析不同能量下 Au+Au 碰撞中的超子量来验证这一预言。我们观察到，在校正了陌生化产生的抑制之后，净超产率符合预期的指数形式。所提取的net-$Lambda$、net-$Xi$和net-$Omega$的斜率参数在不确定性范围内与net-质子的斜率参数相互一致，而且没有中心依赖性，这进一步证实了重子交界图景。PYTHIA事件发生器的各种实施方案，主要是基于价夸克的重子输运，无法同时描述所有重子的斜率参数。
{"title":"Beam energy dependence of net-hyperon yield and its implication on baryon transport mechanism","authors":"Chun Yuen Tsang, Rongrong Ma, Prithwish Tribedy, Zhangbu Xu","doi":"arxiv-2409.06492","DOIUrl":"https://doi.org/arxiv-2409.06492","url":null,"abstract":"In the constituent quark model, each valence quark inside a baryon carries\u00001/3 unit of the baryon number. An alternative picture exists where the center\u0000of a Y-shaped topology of gluon fields, called the baryon junction, carries a\u0000unit baryon number. Studying baryon transport over a large rapidity gap\u0000($delta y$) in nuclear collisions provides a possible tool to distinguish\u0000these two pictures. A recent analysis of global data on net-proton yield at\u0000mid-rapidity in Au+Au collisions showed an exponential dependence on $delta y$\u0000and the exponential slope does not vary with event centrality, favoring the\u0000baryon junction picture. Since junctions are flavor blind, hyperons -- baryons\u0000containing valence strange quarks -- are expected to exhibit a similar behavior\u0000as the proton. This study aims to test this prediction by analyzing hyperon\u0000yields in Au+Au collisions at various energies. We observe that net-hyperon\u0000yields, after correcting for the strangeness production suppression, adhere to\u0000the expected exponential form. The extracted slope parameters for\u0000net-$Lambda$, net-$Xi$ and net-$Omega$ are consistent with each other and\u0000with those of net-proton within uncertainties, and exhibit no centrality\u0000dependence, further substantiating the baryon junction picture. Various\u0000implementations of the PYTHIA event generator, primarily based on valence\u0000quarks for baryon transport, are unable to simultaneously describe the slope\u0000parameters for all baryons.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Azimuthal modulations are crucial for the phenomenological extraction and separation of various generalized parton distributions. We provide a new choice of frame and corresponding formalism to describe the azimuthal distributions, based on the separation of physics occurring at different momentum scales. We demonstrate that this new description is not only well-suited for experimental analysis, but also advantageous in separating contributions from different subprocesses to the same physical cross section.
{"title":"Azimuthal modulations and extraction of generalized parton distributions","authors":"Jian-Wei Qiu, Nobuo Sato, Zhite Yu","doi":"arxiv-2409.06882","DOIUrl":"https://doi.org/arxiv-2409.06882","url":null,"abstract":"Azimuthal modulations are crucial for the phenomenological extraction and\u0000separation of various generalized parton distributions. We provide a new choice\u0000of frame and corresponding formalism to describe the azimuthal distributions,\u0000based on the separation of physics occurring at different momentum scales. We\u0000demonstrate that this new description is not only well-suited for experimental\u0000analysis, but also advantageous in separating contributions from different\u0000subprocesses to the same physical cross section.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We compute baryon and electric charge deposition in high-energy heavy-ion collisions using the Color Glass Condensate (CGC) Effective Field Theory, where at leading order charge is deposited through multiple scatterings of valence quarks with a saturated gluon target. A simplified phenomenological formula is derived to describe charge deposition, from which the parametrical dependence with collisional energy and geometry can be extracted. We present an approximate analytical prediction of the so-called baryon stopping parameter $alpha_B$, which shows excellent agreement with the state-of-the art extractions of $alpha_B$ from experimental data. These results are further validated using the McDIPPER framework, by computing charge deposition at midrapidity across a range of collision energies ($sqrt{s_{rm NN}}= 62.4 - 5020$ GeV).
{"title":"Baryon stopping and charge deposition in heavy-ion collisions due to gluon saturation","authors":"Oscar Garcia-Montero, Sören Schlichting","doi":"arxiv-2409.06788","DOIUrl":"https://doi.org/arxiv-2409.06788","url":null,"abstract":"We compute baryon and electric charge deposition in high-energy heavy-ion\u0000collisions using the Color Glass Condensate (CGC) Effective Field Theory, where\u0000at leading order charge is deposited through multiple scatterings of valence\u0000quarks with a saturated gluon target. A simplified phenomenological formula is\u0000derived to describe charge deposition, from which the parametrical dependence\u0000with collisional energy and geometry can be extracted. We present an\u0000approximate analytical prediction of the so-called baryon stopping parameter\u0000$alpha_B$, which shows excellent agreement with the state-of-the art\u0000extractions of $alpha_B$ from experimental data. These results are further\u0000validated using the McDIPPER framework, by computing charge deposition at\u0000midrapidity across a range of collision energies ($sqrt{s_{rm NN}}= 62.4 -\u00005020$ GeV).","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The nature of near-threshold resonances is quantitatively studied with a new interpretation scheme using the complex compositeness. A difficulty was known in the understanding of the internal structure of unstable resonances because their complex compositeness is not an interpretable measure. To overcome this problem, we develop a new interpretation scheme respecting the ambiguous aspects of the identification of the internal structure of resonances. We then apply the interpretation scheme to the near-threshold resonances slightly above the threshold, described by the effective range expansion. With the new interpretation scheme, we show that near-threshold resonances are dominated by the non-molecular component. Namely, even in the near-threshold region, the nature of resonances is sharply contrasted with bound states whose internal structure is usually molecular dominant.
{"title":"Structure of near-threshold resonances with new interpretation scheme of complex compositeness","authors":"Tomona Kinugawa, Tetsuo Hyodo","doi":"arxiv-2409.06440","DOIUrl":"https://doi.org/arxiv-2409.06440","url":null,"abstract":"The nature of near-threshold resonances is quantitatively studied with a new\u0000interpretation scheme using the complex compositeness. A difficulty was known\u0000in the understanding of the internal structure of unstable resonances because\u0000their complex compositeness is not an interpretable measure. To overcome this\u0000problem, we develop a new interpretation scheme respecting the ambiguous\u0000aspects of the identification of the internal structure of resonances. We then\u0000apply the interpretation scheme to the near-threshold resonances slightly above\u0000the threshold, described by the effective range expansion. With the new\u0000interpretation scheme, we show that near-threshold resonances are dominated by\u0000the non-molecular component. Namely, even in the near-threshold region, the\u0000nature of resonances is sharply contrasted with bound states whose internal\u0000structure is usually molecular dominant.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
$alpha$ decay is one of the prominent decay modes in the nucleosynthesis of heavy and super-heavy elements synthesized at temperatures of the order of Giga Kelvin. To facilitate the investigation of the role played by the $alpha$ decay half-lives of thermally excited nuclei in nucleosynthesis calculations, an empirical formula based on a model for the $alpha$ decay of nuclei in their ground and excited states to daughter nuclei in their ground or excited states is presented. Constants appearing in the analytical expression for the $alpha$ decay half-life obtained within the model are treated as adjustable parameters and fitted to experimental data on 342 $alpha$ decays in the range of 82 $le Z_p le$ 94, to obtain an excitation energy-dependent decay law. Under the assumption that thermal equilibrium has been reached between nuclear states, temperature ($T$)-dependent half-lives, $t_{1/2}(T)$, for several of the experimentally studied $alpha$ emitters with 65 $le Z_p le$ 94 are presented using available data on the half-lives of excited nuclei. Though the general trend is a decrease in $t_{1/2}(T)$ at elevated temperatures, exceptional cases with increased half-lives are found in the case of some isomeric states. A list of such isomers provided in this work motivates future work involving considerations of their thermal equilibration and role in shaping kilonova light curves.
{"title":"Alpha decay law of excited nuclei and its role in stellar decay rates","authors":"D. F. Rojas-Gamboa, N. G. Kelkar, O. L. Caballero","doi":"arxiv-2409.06761","DOIUrl":"https://doi.org/arxiv-2409.06761","url":null,"abstract":"$alpha$ decay is one of the prominent decay modes in the nucleosynthesis of\u0000heavy and super-heavy elements synthesized at temperatures of the order of Giga\u0000Kelvin. To facilitate the investigation of the role played by the $alpha$\u0000decay half-lives of thermally excited nuclei in nucleosynthesis calculations,\u0000an empirical formula based on a model for the $alpha$ decay of nuclei in their\u0000ground and excited states to daughter nuclei in their ground or excited states\u0000is presented. Constants appearing in the analytical expression for the $alpha$\u0000decay half-life obtained within the model are treated as adjustable parameters\u0000and fitted to experimental data on 342 $alpha$ decays in the range of 82 $le\u0000Z_p le$ 94, to obtain an excitation energy-dependent decay law. Under the\u0000assumption that thermal equilibrium has been reached between nuclear states,\u0000temperature ($T$)-dependent half-lives, $t_{1/2}(T)$, for several of the\u0000experimentally studied $alpha$ emitters with 65 $le Z_p le$ 94 are presented\u0000using available data on the half-lives of excited nuclei. Though the general\u0000trend is a decrease in $t_{1/2}(T)$ at elevated temperatures, exceptional cases\u0000with increased half-lives are found in the case of some isomeric states. A list\u0000of such isomers provided in this work motivates future work involving\u0000considerations of their thermal equilibration and role in shaping kilonova\u0000light curves.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nikolas Cruz-Camacho, Rajesh Kumar, Mateus Reinke Pelicer, Jeff Peterson, T. Andrew Manning, Roland Haas, Veronica Dexheimer, Jaquelyn Noronha-Hostler
In this paper we explore independently for the first time three chemical potentials (baryon $mu_B$, charged $mu_Q$, and strange $mu_S$) in the Chiral mean-field (CMF) model. We designed and implemented texttt{CMF++}, a new version of the CMF model rewritten in texttt{C++} that is optimized, modular, and well-documented. texttt{CMF++} has been integrated into the MUSES Calculation Engine as a free and open source software module. The runtime improved in more than 4 orders of magnitude across all 3 chemical potentials, when compared to the legacy code. Here we focus on the zero temperature case and study stable, as well as metastable and unstable, vacuum, hadronic, and quark phases, showing how phase boundaries vary with the different chemical potentials. Due to the significant numerical improvements in texttt{CMF++}, we can calculate for the first time high-order susceptibilities within the CMF framework to study the properties of the quark deconfinement phase transition. We found phases of matter that include a light hadronic phase, strangeness-dominated hadronic phase, and quark deconfinement within our $mu_B$, $mu_S$, $mu_Q$ phase space. The phase transitions are of first, second (quantum critical point), and third order between these phases and we even identified a tricritical point.
{"title":"Phase Stability in the 3-Dimensional Open-source Code for the Chiral mean-field Model","authors":"Nikolas Cruz-Camacho, Rajesh Kumar, Mateus Reinke Pelicer, Jeff Peterson, T. Andrew Manning, Roland Haas, Veronica Dexheimer, Jaquelyn Noronha-Hostler","doi":"arxiv-2409.06837","DOIUrl":"https://doi.org/arxiv-2409.06837","url":null,"abstract":"In this paper we explore independently for the first time three chemical\u0000potentials (baryon $mu_B$, charged $mu_Q$, and strange $mu_S$) in the Chiral\u0000mean-field (CMF) model. We designed and implemented texttt{CMF++}, a new\u0000version of the CMF model rewritten in texttt{C++} that is optimized, modular,\u0000and well-documented. texttt{CMF++} has been integrated into the MUSES\u0000Calculation Engine as a free and open source software module. The runtime\u0000improved in more than 4 orders of magnitude across all 3 chemical potentials,\u0000when compared to the legacy code. Here we focus on the zero temperature case\u0000and study stable, as well as metastable and unstable, vacuum, hadronic, and\u0000quark phases, showing how phase boundaries vary with the different chemical\u0000potentials. Due to the significant numerical improvements in texttt{CMF++}, we\u0000can calculate for the first time high-order susceptibilities within the CMF\u0000framework to study the properties of the quark deconfinement phase transition.\u0000We found phases of matter that include a light hadronic phase,\u0000strangeness-dominated hadronic phase, and quark deconfinement within our\u0000$mu_B$, $mu_S$, $mu_Q$ phase space. The phase transitions are of first,\u0000second (quantum critical point), and third order between these phases and we\u0000even identified a tricritical point.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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