Pub Date : 2022-06-22DOI: 10.31349/suplrevmexfis.3.020720
Norma Selomit Ramírez Uribe
A general outlook is presented on the study of multiloop topologies appearing for the first time at four loops. A unified description and representation of this family is provided, the so-called N4MLT universal topology. Based on the Loop-Tree Duality framework, we discuss the dual opening of this family and expose the relevance of a causal representation. We explore an alternative procedure for the search of causal singular configurations of selected N4MLT Feynman diagrams through the application of a modified Grover's quantum algorithm.
{"title":"Four-loop scattering amplitudes through the loop-tree duality","authors":"Norma Selomit Ramírez Uribe","doi":"10.31349/suplrevmexfis.3.020720","DOIUrl":"https://doi.org/10.31349/suplrevmexfis.3.020720","url":null,"abstract":"A general outlook is presented on the study of multiloop topologies appearing for the first time at four loops. A unified description and representation of this family is provided, the so-called N4MLT universal topology. Based on the Loop-Tree Duality framework, we discuss the dual opening of this family and expose the relevance of a causal representation. We explore an alternative procedure for the search of causal singular configurations of selected N4MLT Feynman diagrams through the application of a modified Grover's quantum algorithm.","PeriodicalId":210091,"journal":{"name":"Suplemento de la Revista Mexicana de Física","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116809536","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}
Pub Date : 2022-06-20DOI: 10.31349/suplrevmexfis.3.0308120
T. Akaishi, A. Sakaguchi, T. Toda, M. Tokuda, H. Asano, K. Itahashi, M. Iwasaki, Yue Ma, R. Murayama, H. Outa, F. Sakuma, T. Yamaga, A. Clozza, C. Curceanu, R R Del Grande, C. Guaraldo, M. Iliescu, M. Miliucci, K. Piscicchia, A. Scordo, D. Sirghi, F. Sirghi, C. Han, X. Yuan, P. Zhang, Y. Zhang, T. Hashimoto, K. Tanida, S. Ishimoto, S. Suzuki, M. Sato, K. Inoue, H. Noumi, K. Shirotori, H. Ohnishi, S. Okada, H. Zhang
In the last decade, heavy-ion based experiments (HypHI, STAR and ALICEi ) announced surprisingly short lifetime for 3 ΛH mesonic weak decay (MWD), which is difficult to interpret given the fact that 3 ΛH is a very loosely bound system. It will be very interesting to study this issue with a different experimental approach. We propose a direct measurement for 3 ΛH hypernucleus MWD lifetime with ∼10% precision as J-PARC E73 experiment; 4 ΛH hypernucleus lifetime will also be measured as a feasibility test for our experimental approach. In this proceeding, we will introduce the experimental method and the current status of E73 experiment.
{"title":"Status of J-PARC E73 experiment: first direct Hypertriton lifetime measurement with 3He(K--, π 0 ) 3Λ H reaction","authors":"T. Akaishi, A. Sakaguchi, T. Toda, M. Tokuda, H. Asano, K. Itahashi, M. Iwasaki, Yue Ma, R. Murayama, H. Outa, F. Sakuma, T. Yamaga, A. Clozza, C. Curceanu, R R Del Grande, C. Guaraldo, M. Iliescu, M. Miliucci, K. Piscicchia, A. Scordo, D. Sirghi, F. Sirghi, C. Han, X. Yuan, P. Zhang, Y. Zhang, T. Hashimoto, K. Tanida, S. Ishimoto, S. Suzuki, M. Sato, K. Inoue, H. Noumi, K. Shirotori, H. Ohnishi, S. Okada, H. Zhang","doi":"10.31349/suplrevmexfis.3.0308120","DOIUrl":"https://doi.org/10.31349/suplrevmexfis.3.0308120","url":null,"abstract":"In the last decade, heavy-ion based experiments (HypHI, STAR and ALICEi ) announced surprisingly short lifetime for 3 ΛH mesonic weak decay (MWD), which is difficult to interpret given the fact that 3 ΛH is a very loosely bound system. It will be very interesting to study this issue with a different experimental approach. We propose a direct measurement for 3 ΛH hypernucleus MWD lifetime with ∼10% precision as J-PARC E73 experiment; 4 ΛH hypernucleus lifetime will also be measured as a feasibility test for our experimental approach. In this proceeding, we will introduce the experimental method and the current status of E73 experiment.","PeriodicalId":210091,"journal":{"name":"Suplemento de la Revista Mexicana de Física","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132161178","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}
Pub Date : 2022-06-20DOI: 10.31349/suplrevmexfis.3.0308125
Peter Vander Griend
The hierarchy of scales of heavy quarks and their bound states in a quark gluon plasma makes the system ideally suited for the use of effective field theories and the formalism of open quantum systems. We utilize these tools to perform a first principles treatment of these heavy particles in medium and analyze the regimes in which the dynamics take the form of a Langevin equation in which the medium and the heavy particle interact via random "kicks" altering the particle's momentum.
{"title":"In medium dynamics of heavy particles","authors":"Peter Vander Griend","doi":"10.31349/suplrevmexfis.3.0308125","DOIUrl":"https://doi.org/10.31349/suplrevmexfis.3.0308125","url":null,"abstract":"The hierarchy of scales of heavy quarks and their bound states in a quark gluon plasma makes the system ideally suited for the use of effective field theories and the formalism of open quantum systems. We utilize these tools to perform a first principles treatment of these heavy particles in medium and analyze the regimes in which the dynamics take the form of a Langevin equation in which the medium and the heavy particle interact via random \"kicks\" altering the particle's momentum.","PeriodicalId":210091,"journal":{"name":"Suplemento de la Revista Mexicana de Física","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127171271","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}
Pub Date : 2022-06-17DOI: 10.31349/suplrevmexfis.3.0308114
S. Fucini, R. Dupré
In this talk, we present the analysis of a deeply virtual Compton scattering process off 4 He. This study is done within the impulse approximation approach including state-of-the-art models for the nucleonic and nuclear ingredients. A glimpse on the comparison between our results and the experimental data coming form Jefferson Lab is also given. The last part of this work is devoted to the description of the new Monte Carlo event generator based on the models presented in the main part of the talk. First results from the simulations performed at the kinematic conditions foreseen at the Electron Ion Collider are discussed demonstrating that there is a wide enough kinematical range to reach the tomography of 4 He and understand other possible aspects of the elusive nuclear parton dynamics.
{"title":"Unraveling light nuclei with deeply virtual Compton scattering processes: from models to event generation","authors":"S. Fucini, R. Dupré","doi":"10.31349/suplrevmexfis.3.0308114","DOIUrl":"https://doi.org/10.31349/suplrevmexfis.3.0308114","url":null,"abstract":"In this talk, we present the analysis of a deeply virtual Compton scattering process off 4 He. This study is done within the impulse approximation approach including state-of-the-art models for the nucleonic and nuclear ingredients. A glimpse on the comparison between our results and the experimental data coming form Jefferson Lab is also given. The last part of this work is devoted to the description of the new Monte Carlo event generator based on the models presented in the main part of the talk. First results from the simulations performed at the kinematic conditions foreseen at the Electron Ion Collider are discussed demonstrating that there is a wide enough kinematical range to reach the tomography of 4 He and understand other possible aspects of the elusive nuclear parton dynamics.","PeriodicalId":210091,"journal":{"name":"Suplemento de la Revista Mexicana de Física","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132269121","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}
Pub Date : 2022-06-17DOI: 10.31349/suplrevmexfis.3.0308126
K. Rannu, I. Aref’eva, P. Slepov
We study the confinement/deconfinement phase diagram within a five-dimensional fully anisotropic holographic model supported by Einsteindilaton-three-Maxwell action. One of the Maxwell fields provides the chemical potential, the second Maxwell field represents real spacial anisotropy of the QGP produced in heavy-ion collisions and the third Maxwell field is related to an external magnetic field. Influence of the so-called primary anisotropy due to the non-centrality of the heavy-ion collision and secondary anisotropy originating from the external magnetic field on the phase diagram is considered. Based on recent work [1,2].
{"title":"Holographic model in anisotropic hot dense QGP with external Magnetic Field","authors":"K. Rannu, I. Aref’eva, P. Slepov","doi":"10.31349/suplrevmexfis.3.0308126","DOIUrl":"https://doi.org/10.31349/suplrevmexfis.3.0308126","url":null,"abstract":"We study the confinement/deconfinement phase diagram within a five-dimensional fully anisotropic holographic model supported by Einsteindilaton-three-Maxwell action. One of the Maxwell fields provides the chemical potential, the second Maxwell field represents real spacial anisotropy of the QGP produced in heavy-ion collisions and the third Maxwell field is related to an external magnetic field. Influence of the so-called primary anisotropy due to the non-centrality of the heavy-ion collision and secondary anisotropy originating from the external magnetic field on the phase diagram is considered. Based on recent work [1,2].","PeriodicalId":210091,"journal":{"name":"Suplemento de la Revista Mexicana de Física","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130302805","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}
Pub Date : 2022-06-14DOI: 10.31349/suplrevmexfis.3.0308103
D. Chakrabarti, C. Mondal, Asmita Mukherjee, S. Nair, Xingbo Zhao
We present our recent calculation of the gravitational form factors (GFFs) of proton using the light-front quark-diquark model constructed by the soft-wall AdS/QCD. We extract the four quark GFFs by calculating the matrix elements of the symmetric energy momentum tensor. Using the D-term we calculate the pressure and shear distributions of quarks inside the proton in the impact parameter space. The GFFs, A(Q2) and B(Q2) are found to be consistent with the lattice QCD, while the qualitative behavior of the D-term form factor is in agreement with the extracted data from the deeply virtual Compton scattering (DVCS) experiments at JLab, the lattice QCD, and the predictions of different phenomenological models.
{"title":"Proton gravitational form factors and mechanical properties in a light-front quark-diquark model","authors":"D. Chakrabarti, C. Mondal, Asmita Mukherjee, S. Nair, Xingbo Zhao","doi":"10.31349/suplrevmexfis.3.0308103","DOIUrl":"https://doi.org/10.31349/suplrevmexfis.3.0308103","url":null,"abstract":"We present our recent calculation of the gravitational form factors (GFFs) of proton using the light-front quark-diquark model constructed by the soft-wall AdS/QCD. We extract the four quark GFFs by calculating the matrix elements of the symmetric energy momentum tensor. Using the D-term we calculate the pressure and shear distributions of quarks inside the proton in the impact parameter space. The GFFs, A(Q2) and B(Q2) are found to be consistent with the lattice QCD, while the qualitative behavior of the D-term form factor is in agreement with the extracted data from the deeply virtual Compton scattering (DVCS) experiments at JLab, the lattice QCD, and the predictions of different phenomenological models.","PeriodicalId":210091,"journal":{"name":"Suplemento de la Revista Mexicana de Física","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121806135","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}
Pub Date : 2022-06-14DOI: 10.31349/suplrevmexfis.3.0308089
R. Moreira Moita, João M. P. De Mello, T. Federico, W. de Paula
In the present work, we describe a model for the pion based on an analytic expression for the Bethe-Salpeter (BSA) amplitude, combined with some ingredients from Lattice QCD calculations. The running quark mass function M(p2), used here, reproduces well the results of Lattice QCD calculations. The analytical form of the running quark mass function contains a single time-like pole, which implies in time-like poles of the dressed quark propagator. Such a form allows to build the weight functions, Gi(γ, z), for the Nakanishi integral representation of each scalar function, χi(k, p), appearing in the decomposition of the Bethe-Salpeter amplitude in terms of Dirac operators. Such scalar amplitudes can also be used to obtain the pion valence light-front wave function.
{"title":"Pion model with the Nakanishi integral representation","authors":"R. Moreira Moita, João M. P. De Mello, T. Federico, W. de Paula","doi":"10.31349/suplrevmexfis.3.0308089","DOIUrl":"https://doi.org/10.31349/suplrevmexfis.3.0308089","url":null,"abstract":"In the present work, we describe a model for the pion based on an analytic expression for the Bethe-Salpeter (BSA) amplitude, combined with some ingredients from Lattice QCD calculations. The running quark mass function M(p2), used here, reproduces well the results of Lattice QCD calculations. The analytical form of the running quark mass function contains a single time-like pole, which implies in time-like poles of the dressed quark propagator. Such a form allows to build the weight functions, Gi(γ, z), for the Nakanishi integral representation of each scalar function, χi(k, p), appearing in the decomposition of the Bethe-Salpeter amplitude in terms of Dirac operators. Such scalar amplitudes can also be used to obtain the pion valence light-front wave function.","PeriodicalId":210091,"journal":{"name":"Suplemento de la Revista Mexicana de Física","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122552767","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}
Pub Date : 2022-06-14DOI: 10.31349/SuplRevMexFis.3.0308090
M. Varma, P. Schweitzer
A classical model of a stable particle of finite size is studied. The model parameters can be chosen such that the described particle has the mass and radius of a proton. Using the energy-momentum tensor (EMT), we show how the presence of long-range forces alters some notions taken for granted in short-range systems. We focus our attention on the D-term form factor. The important conclusion is that a more careful definition of the D-term may be required when long-range forces are present.
{"title":"Visualization of internal forces inside the proton in a classical relativistic model","authors":"M. Varma, P. Schweitzer","doi":"10.31349/SuplRevMexFis.3.0308090","DOIUrl":"https://doi.org/10.31349/SuplRevMexFis.3.0308090","url":null,"abstract":"A classical model of a stable particle of finite size is studied. The model parameters can be chosen such that the described particle has the mass and radius of a proton. Using the energy-momentum tensor (EMT), we show how the presence of long-range forces alters some notions taken for granted in short-range systems. We focus our attention on the D-term form factor. The important conclusion is that a more careful definition of the D-term may be required when long-range forces are present.","PeriodicalId":210091,"journal":{"name":"Suplemento de la Revista Mexicana de Física","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122883706","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}
Pub Date : 2022-06-13DOI: 10.31349/suplrevmexfis.3.0308079
M. A. Martín Contreras, E. F. Capossoli, Danning Li, Alfredo Vega, H. Boschi-Filho
This work discusses the electromagnetic (EM) pion form factor ($pi FF$) in a deformed AdS geometry. We consider the conformal dimension of the hadron bulk field defined by the scaling dimension of the $q,bar{q}$ operator instead of the twist. We also compute the pion EM radius and compare it with the experimental data, finding a relative error of $2,%$.
{"title":"Electromagnetic Pion form factor in a deformed background","authors":"M. A. Martín Contreras, E. F. Capossoli, Danning Li, Alfredo Vega, H. Boschi-Filho","doi":"10.31349/suplrevmexfis.3.0308079","DOIUrl":"https://doi.org/10.31349/suplrevmexfis.3.0308079","url":null,"abstract":"This work discusses the electromagnetic (EM) pion form factor ($pi FF$) in a deformed AdS geometry. We consider the conformal dimension of the hadron bulk field defined by the scaling dimension of the $q,bar{q}$ operator instead of the twist. We also compute the pion EM radius and compare it with the experimental data, finding a relative error of $2,%$.","PeriodicalId":210091,"journal":{"name":"Suplemento de la Revista Mexicana de Física","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125905107","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}
Pub Date : 2022-06-13DOI: 10.31349/suplrevmexfis.3.0308093
A. Szczurek, R. Maciuła, W. Schäfer
We discuss the production mechanism of fully charm tetraquark, observed last year by the LHCb at M = 6.9 GeV in the J/ψJ/ψ channel. Both single parton scattering (SPS) and double parton scattering (DPS) mechanisms are considered. We calculate the distribution in the invariant mass of the four-quark system, M4c, for SPS and DPS production of ccc¯c¯ in the kt-factorization approach. We present transverse momentum distribution in pt,4c for ccc¯ c¯ system in a mass window around tetraquark mass. The calculation of the SPS g ∗ g ∗ → T4c(6900) fusion mechanism is performed in the kT -factorization approach assuming different spin scenarios (0 + and 0 −).
{"title":"Production mechanism of fully heavy tetraquarks in proton-proton collisions","authors":"A. Szczurek, R. Maciuła, W. Schäfer","doi":"10.31349/suplrevmexfis.3.0308093","DOIUrl":"https://doi.org/10.31349/suplrevmexfis.3.0308093","url":null,"abstract":"We discuss the production mechanism of fully charm tetraquark, observed last year by the LHCb at M = 6.9 GeV in the J/ψJ/ψ channel. Both single parton scattering (SPS) and double parton scattering (DPS) mechanisms are considered. We calculate the distribution in the invariant mass of the four-quark system, M4c, for SPS and DPS production of ccc¯c¯ in the kt-factorization approach. We present transverse momentum distribution in pt,4c for ccc¯ c¯ system in a mass window around tetraquark mass. The calculation of the SPS g ∗ g ∗ → T4c(6900) fusion mechanism is performed in the kT -factorization approach assuming different spin scenarios (0 + and 0 −).","PeriodicalId":210091,"journal":{"name":"Suplemento de la Revista Mexicana de Física","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129988568","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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