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Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2018)最新文献

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"Invisible" axion rolling through QCD phase transition “看不见的”轴子滚动通过QCD相变
Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2018) Pub Date : 2019-02-07 DOI: 10.22323/1.347.0052
Jihn E. Kim, Se-Jin Kim
{"title":"\"Invisible\" axion rolling through QCD phase transition","authors":"Jihn E. Kim, Se-Jin Kim","doi":"10.22323/1.347.0052","DOIUrl":"https://doi.org/10.22323/1.347.0052","url":null,"abstract":"The origin of “invisible” axion in four dimensional effective beyond-standard models from string compactification is discussed and its refined passover through the QCD phase transition is presented toward a reliable estimate of the current axion energy density in terms of the initial misalignment angle θ̄1. The explicit examples are presented in a flipped SU(5) GUT model. This allows to introduce a flavor symmetry through string compactification, and hence we also comment on the source of flavor symmetries from string compactification and attempts to fit the resulting Yukawa couplings to the observed Cabibbo-Kobayashi-Maskawa and Pontecorvo-MakiNakagawa-Sakata matrices.","PeriodicalId":278184,"journal":{"name":"Proceedings of Corfu Summer Institute 2018 \"School and Workshops on Elementary Particle Physics and Gravity\" — PoS(CORFU2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130392771","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}
引用次数: 1
Evolution of multiplicity fluctuations in heavy ion collisions 重离子碰撞中多重涨落的演化
Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2018) Pub Date : 2019-01-30 DOI: 10.22323/1.347.0200
Radka Sochorová, B. Tomášik
{"title":"Evolution of multiplicity fluctuations in heavy ion collisions","authors":"Radka Sochorová, B. Tomášik","doi":"10.22323/1.347.0200","DOIUrl":"https://doi.org/10.22323/1.347.0200","url":null,"abstract":"The evolution of multiplicity distribution of a species which undergoes chemical reactions can be described with the help of a master equation. We study the master equation for a fixed temperature, because we want to know how fast different moments of the multiplicity distribution approach their equilibrium value. We particularly look at the 3rd and 4th factorial moments and their equilibrium values from which central moments, cumulants and their ratios can be calculated. Then we study the situation in which the temperature of the system decreases. We find out that in the non-equilibrium state, higher factorial moments differ more from their equilibrium values than the lower moments and that the behaviour of the combination of the central moments depends on the combination we choose. If one chooses to determine the chemical freeze-out temperature from the measured values of higher moments, these effects might jeopardise the correctness of the extracted value.","PeriodicalId":278184,"journal":{"name":"Proceedings of Corfu Summer Institute 2018 \"School and Workshops on Elementary Particle Physics and Gravity\" — PoS(CORFU2018)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127525451","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}
引用次数: 0
Moduli stabilisation and inflation in type IIB/F-theory IIB/ f型理论中的模稳定和膨胀
Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2018) Pub Date : 2019-01-15 DOI: 10.22323/1.347.0068
I. Antoniadis, Yifan Chen, G. Leontaris
{"title":"Moduli stabilisation and inflation in type IIB/F-theory","authors":"I. Antoniadis, Yifan Chen, G. Leontaris","doi":"10.22323/1.347.0068","DOIUrl":"https://doi.org/10.22323/1.347.0068","url":null,"abstract":"In the first part of this talk, a short overview of the ongoing debate on the existence of de Sitter vacua in string theory is presented. In the second part, the moduli stabilisation and inflation are discussed in the context of type IIB/F-theory. Considering a configuration of three intersecting $D7$ branes with fluxes, it is shown that higher loop effects inducing logarithmic corrections to the Kahler potential can stabilise the Kahler moduli in a de Sitter Vacuum. When a new Fayet-Iliopoulos term is included, it is also possible to generate the required number of e-foldings and satisfy the conditions for slow-roll inflation.","PeriodicalId":278184,"journal":{"name":"Proceedings of Corfu Summer Institute 2018 \"School and Workshops on Elementary Particle Physics and Gravity\" — PoS(CORFU2018)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126558511","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}
引用次数: 3
Signatures of the type-I 2HDM at the LHC LHC中i型2HDM的特征
Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2018) Pub Date : 2018-12-20 DOI: 10.22323/1.347.0013
R. Enberg, William Klemm, S. Moretti, S. Munir
{"title":"Signatures of the type-I 2HDM at the LHC","authors":"R. Enberg, William Klemm, S. Moretti, S. Munir","doi":"10.22323/1.347.0013","DOIUrl":"https://doi.org/10.22323/1.347.0013","url":null,"abstract":"One of the simplest extensions of the Standard Model (SM) is the two-Higgs-doublet model (2HDM), which contains two neutral Higgs bosons, in addition to a 125 GeV one, and a charged pair. At the Large Hadron Collider (LHC), gluon-induced processes are generally the most important modes for the resonant production of the SM-like Higgs boson as well as its pair-production, and it is generally considered to be the case also for an additional neutral Higgs boson possibly existing in nature. We show that for certain parameter configurations in the Type-I 2HDM, electroweak pair-production of the neutral Higgs states can dominate over the QCD-initiated production. Moreover, it is possible for the pair-production of the charged Higgs state along with a neutral one, which can only take place electroweakly, to have a substantial cross section. We delineate such 2HDM parameter space regions through its comprehensive numerical scanning, requiring their consistency with the most relevant theoretical and experimental constraints. We also highlight some specific di-Higgs signatures that can be probed at the LHC in order to establish the Type-I 2HDM as the underlying new physics model.","PeriodicalId":278184,"journal":{"name":"Proceedings of Corfu Summer Institute 2018 \"School and Workshops on Elementary Particle Physics and Gravity\" — PoS(CORFU2018)","volume":"4608 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132989236","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}
引用次数: 3
QCD matter with a crossover and a first-order phase transition 具有交叉和一阶相变的QCD物质
Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2018) Pub Date : 2018-12-04 DOI: 10.22323/1.347.0157
C. Plumberg, T. Welle, J. Kapusta
{"title":"QCD matter with a crossover and a first-order phase transition","authors":"C. Plumberg, T. Welle, J. Kapusta","doi":"10.22323/1.347.0157","DOIUrl":"https://doi.org/10.22323/1.347.0157","url":null,"abstract":"We present a phenomenological parametrization of the phase diagram of QCD as a function of temperature $T$ and baryochemical potential $mu$. The parametrization is constructed by introducing a switching function which controls the nature of the transition between the Hadron-Resonance Gas (HRG) and Quark-Gluon Plasma (QGP) phases of nuclear matter, such that the equation of state (EOS) possesses a rapid crossover at large $T$ and small $mu$, a critical point placed anywhere along the phase transition line, and a first-order transition at small $T$ and large $mu$. This EOS offers a convenient phenomenological tool for assessing the possible effects of the conjectured QCD critical point on heavy-ion observables.","PeriodicalId":278184,"journal":{"name":"Proceedings of Corfu Summer Institute 2018 \"School and Workshops on Elementary Particle Physics and Gravity\" — PoS(CORFU2018)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130112525","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}
引用次数: 2
Axion properties in GUTs GUTs中的轴子性质
Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2018) Pub Date : 2018-11-28 DOI: 10.22323/1.347.0054
A. Ernst, L. Luzio, A. Ringwald, C. Tamarit
{"title":"Axion properties in GUTs","authors":"A. Ernst, L. Luzio, A. Ringwald, C. Tamarit","doi":"10.22323/1.347.0054","DOIUrl":"https://doi.org/10.22323/1.347.0054","url":null,"abstract":"We summarize recent studies of realistic nonsupersymmetric Grand Unified Theories (GUTs) extended with a global $U(1)_{rm PQ}$ symmetry, so as to accommodate the axion solution to the strong CP problem. Aside from solving the CP problem and unifying the gauge structure of the SM, these models can also yield realistic spectra and mixings, including neutrino masses, and allowing for a consistent cosmological history that accounts for inflation, dark matter and baryogenesis. In our studies of $SO(10)$ and $SU(5)$ theories, we determined the mass and couplings of the axion in terms of the relevant threshold scales, and assessed how the former are constrained from the requirements of gauge coupling unification, proton decay searches and collider bounds. The axion mass ends up being rather constrained for GUT scale axions, particularly in the case of $SU(5)$, and could be probed by upcoming dark matter experiments, such as ABRACADABRA and CASPEr-Electric.","PeriodicalId":278184,"journal":{"name":"Proceedings of Corfu Summer Institute 2018 \"School and Workshops on Elementary Particle Physics and Gravity\" — PoS(CORFU2018)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133645027","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}
引用次数: 11
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