Catálogo de publicaciones - revistas

<jats:title>Abstract</jats:title> <jats:p>The strong coupling constants of hadronic multiplets are fundamental parameters which carry information about the strong interactions among participating particles. These parameters can help us construct the hadron-hadron strong potential and gain information about the structure of the involved hadrons. Motivated by the recent observation of the doubly charmed <jats:inline-formula> <jats:tex-math><?CDATA $ \Xi_{cc} $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_023120_M1.jpg" xlink:type="simple" /> </jats:inline-formula> state by LHCb, we determine the strong coupling constants among the doubly heavy spin-1/2 baryons, <jats:inline-formula> <jats:tex-math><?CDATA $ \Xi^{(\prime)}_{QQ^\prime } $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_023120_M2.jpg" xlink:type="simple" /> </jats:inline-formula>, <jats:inline-formula> <jats:tex-math><?CDATA $ \Omega^{(\prime)}_{QQ^\prime} $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_023120_M3.jpg" xlink:type="simple" /> </jats:inline-formula> and light pseudoscalar mesons, <jats:inline-formula> <jats:tex-math><?CDATA $ \pi $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_023120_M4.jpg" xlink:type="simple" /> </jats:inline-formula>, <jats:italic>K</jats:italic>, <jats:inline-formula> <jats:tex-math><?CDATA $ \eta $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_023120_M5.jpg" xlink:type="simple" /> </jats:inline-formula> and <jats:inline-formula> <jats:tex-math><?CDATA $ \eta^\prime $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_023120_M6.jpg" xlink:type="simple" /> </jats:inline-formula> within the framework of the light cone QCD sum rules. The obtained results may help experimental groups in analysis of the related data at hadron colliders. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>The thermodynamics and overcharging problem in RN-AdS black holes with a cloud of strings and quintessence are investigated by the absorption of scalar particles and fermions in extended phase space. The cosmological constant is treated as the pressure of the black hole. The parameters related to quintessence and the cloud of strings are treated as thermodynamic variables. We find that the first law of thermodynamics is satisfied and the second law of thermodynamics is indefinite. Furthermore, we find that near-extremal and extremal black holes cannot be overcharged.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>The asymptotic symmetries in the Brans-Dicke theory are analyzed using Penrose's conformal completion method, which is independent of the coordinate system used. These symmetries, indeed, include supertranslations and Lorentz transformations for an asymptotically flat spacetime. With the Wald-Zoupas formalism, “conserved charges” and fluxes of the Bondi-Metzner-Sachs algebra are computed. The scalar degree of freedom contributes only to the Lorentz boost charge, even though it plays a role in various fluxes. The flux-balance laws are further applied to constrain the displacement memory, spin memory, and center-of-mass memory effects.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>The thick-target yield of the <jats:sup>9</jats:sup>Be(<jats:italic>d</jats:italic>, <jats:italic>α</jats:italic> <jats:sub>0</jats:sub>)<jats:sup>7</jats:sup>Li and <jats:sup>9</jats:sup>Be(<jats:italic>d</jats:italic>, <jats:italic>α</jats:italic> <jats:sub>1</jats:sub>)<jats:sup>7</jats:sup>Li<jats:sup>*</jats:sup> reactions has been first directly measured over deuteron energies from 66 to 94 keV. The obtained <jats:italic>S</jats:italic>(<jats:italic>E</jats:italic> <jats:sub>i</jats:sub>) of <jats:italic>α</jats:italic> <jats:sub>0</jats:sub> and <jats:italic>α</jats:italic> <jats:sub>1</jats:sub> have similar trends calculated by the thin-target yield, consistent with Yan’s report within the errors. Furthermore, the parametric expression of <jats:italic>S</jats:italic>(<jats:italic>E</jats:italic>) was obtained to calculate the theoretical thick target yield, and it roughly agrees with the experimental thick target yield. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>Novel measurements of the neutron energy spectra of the <jats:sup>9</jats:sup>Be(<jats:italic>d</jats:italic>,<jats:italic>n</jats:italic>)<jats:sup>10</jats:sup>B reaction with a thick beryllium target are performed using a fast neutron time-of-flight (TOF) spectrometer for the neutron emission angles <jats:inline-formula> <jats:tex-math><?CDATA $\theta=0^\circ$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024002_M1.jpg" xlink:type="simple" /> </jats:inline-formula> and <jats:inline-formula> <jats:tex-math><?CDATA $45^\circ$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024002_M2.jpg" xlink:type="simple" /> </jats:inline-formula>, and the incident deuteron energies are 250 and 300 keV, respectively. The neutron contributions from the <jats:sup>9</jats:sup>Be(<jats:italic>d</jats:italic>,<jats:italic>n</jats:italic>)<jats:sup>10</jats:sup>B reaction are distributed relatively independently for the ground state and the first, second, and third excited states of <jats:sup>10</jats:sup>B. The branching ratios of the <jats:sup>9</jats:sup>Be(<jats:italic>d</jats:italic>,<jats:italic>n</jats:italic>)<jats:sup>10</jats:sup>B reaction for the different excited states of <jats:sup>10</jats:sup>B are obtained for the neutron emission angles <jats:inline-formula> <jats:tex-math><?CDATA $\theta=0^\circ$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024002_M3.jpg" xlink:type="simple" /> </jats:inline-formula> and <jats:inline-formula> <jats:tex-math><?CDATA $45^\circ$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024002_M4.jpg" xlink:type="simple" /> </jats:inline-formula>, and the incident deuteron energies are 250 and 300 keV, respectively. The branching ratio of the <jats:sup>9</jats:sup>Be(<jats:italic>d</jats:italic>,<jats:italic>n</jats:italic>)<jats:sup>10</jats:sup>B reaction for the third excited state decreases with increase in the incident deuteron energy, and the branching ratios for the ground state and the second excited state increase with increase in the neutron emission angle. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>Heavy ion collisions near the Fermi energy produce a ‘freezout’ region where fragments appear and later decay, emitting mainly neutrons, protons, alpha particles, and gamma rays. These decay products carry information about the decaying nuclei. Fragmentation events may result in high yields of boson particles, especially alpha particles, and may carry important information about the nuclear Bose Einstein condensate (BEC). We study ‘in medium’ four <jats:italic>α</jats:italic> correlations and link them to the ‘fission’ of <jats:sup>16</jats:sup>O in two <jats:sup>8</jats:sup>Be in the ground state or <jats:sup>12</jats:sup>C<jats:sup>*</jats:sup>(Hoyle state)+<jats:italic>α</jats:italic>. Using novel techniques for the correlation functions, we confirm the resonance of <jats:sup>16</jats:sup>O at 15.2 MeV excitation energy, and the possibility of a lower resonance, close to 14.72 MeV. The latter resonance is the result of all <jats:italic>α</jats:italic> particles having 92 keV relative kinetic energies. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>In the context of the double folding optical model, the strong refractive effect for elastic scattering of <jats:sup>11</jats:sup>Li + <jats:sup>12</jats:sup>C and <jats:sup>11</jats:sup>Li + <jats:sup>28</jats:sup>Si systems at incident energies of 29, 50, and 60 MeV/n is studied. Real folded potentials are generated based on a variety of nucleon-nucleon interactions with the suggested density distributions for the halo structure of <jats:sup>11</jats:sup>Li nuclei. The rearrangement term (RT) of the extended realistic density dependent CDM3Y6 effective interaction is considered. The imaginary potential was taken in the traditional standard Woods-Saxon form. Satisfactory results for the calculated potentials are obtained, with a slight effect of the RT in CDM3Y6 potential. Successful reproduction with a normalization factor close to one for the observed angular distributions of the elastic scattering differential cross section has been achieved using the derived potentials. The obtained reaction cross-section is studied as a guide by extrapolating our calculations and previous results. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>In this paper, we investigate the medium modifications of girth distributions for inclusive jets and <jats:inline-formula> <jats:tex-math><?CDATA $Z^0$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024102_M2.jpg" xlink:type="simple" /> </jats:inline-formula> tagged jets with a small radius ( <jats:inline-formula> <jats:tex-math><?CDATA $R=0.2$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024102_M3.jpg" xlink:type="simple" /> </jats:inline-formula>) in Pb+Pb collisions with <jats:inline-formula> <jats:tex-math><?CDATA $\sqrt{s}=2.76$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024102_M4.jpg" xlink:type="simple" /> </jats:inline-formula> TeV at the LHC. The partonic spectra in the initial hard scattering of elementary collisions are obtained by an event generator POWHEG+PYTHIA, which matches the next-to-leading order (NLO) matrix elements with parton showering, and the energy loss of a fast parton traversing the hot/dense QCD medium is calculated by Monte Carlo simulation within the higher-twist formalism of jet quenching in heavy-ion collisions. We present the model calculations of event normalized girth distributions for inclusive jets in <jats:italic>p</jats:italic>+<jats:italic>p</jats:italic> and Pb+Pb collisions at <jats:inline-formula> <jats:tex-math><?CDATA $\sqrt{s}=2.76$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024102_M5.jpg" xlink:type="simple" /> </jats:inline-formula> TeV, which give good descriptions of ALICE measurements. It is shown that the girth distributions of inclusive jets in Pb+Pb are shifted to lower girth regions relative to those in <jats:italic>p</jats:italic>+<jats:italic>p</jats:italic>. Thus, the nuclear modification factor of girth distributions for inclusive jets is larger than unity at small girth regions and smaller than unity at large girth regions. This behavior results from softer fragments inside a jet as well as the fraction alteration of gluon/quark initiated jets in heavy-ion collisions. We further predict the girth distributions for <jats:inline-formula> <jats:tex-math><?CDATA $Z^0$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024102_M6.jpg" xlink:type="simple" /> </jats:inline-formula> boson tagged jets in Pb+Pb collisions at <jats:inline-formula> <jats:tex-math><?CDATA $\sqrt{s}=2.76$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024102_M7.jpg" xlink:type="simple" /> </jats:inline-formula> TeV and demonstrate that the medium modification on girth distributions for <jats:inline-formula> <jats:tex-math><?CDATA $Z^0$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024102_M8.jpg" xlink:type="simple" /> </jats:inline-formula> tagged jets is less pronounced compared to that for inclusive jets because the dominant components of <jats:inline-formula> <jats:tex-math><?CDATA $Z^0$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024102_M9.jpg" xlink:type="simple" /> </jats:inline-formula> tagged jets are quark-initiated jets. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>We use the two lowest weight states to fit <jats:italic>E</jats:italic>2 strengths connecting the <jats:inline-formula> <jats:tex-math><?CDATA $0\leftrightarrow 2$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024103_M1.jpg" xlink:type="simple" /> </jats:inline-formula> and <jats:inline-formula> <jats:tex-math><?CDATA $2\leftrightarrow 4$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024103_M2.jpg" xlink:type="simple" /> </jats:inline-formula> transitions in <jats:inline-formula> <jats:tex-math><?CDATA $^{96,98}$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024103_M3.jpg" xlink:type="simple" /> </jats:inline-formula>Mo. Our results confirm that the <jats:inline-formula> <jats:tex-math><?CDATA $2^+$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024103_M4.jpg" xlink:type="simple" /> </jats:inline-formula> and <jats:inline-formula> <jats:tex-math><?CDATA $4^+$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024103_M5.jpg" xlink:type="simple" /> </jats:inline-formula> states are maximally mixed, and that the <jats:inline-formula> <jats:tex-math><?CDATA $0^+$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_45_2_024103_M6.jpg" xlink:type="simple" /> </jats:inline-formula> states are weakly mixed in both nuclei. An appropriate Hamiltonian to represent the band mixing is found to be exactly solvable, and its eigenstates can be expressed as the basis vectors in the configuration mixing scheme and interacting boson model. The interacting boson model and coexistence mixing configuration under the solvable methods are suitable models for analyzing the band mixing with high accuracy. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>It is universally acknowledged that the Generalized Liquid Drop Model (GLDM) has two advantages over other <jats:italic>α</jats:italic> decay theoretical models: introduction of the quasimolecular shape mechanism and proximity energy. In the past few decades, the original proximity energy has been improved by numerous works. In the present work, the different improvements of proximity energy are examined when they are applied to the GLDM for enhancing the calculation accuracy and prediction ability of <jats:italic>α</jats:italic> decay half-lives for known and unsynthesized superheavy nuclei. The calculations of <jats:italic>α</jats:italic> half-lives have systematic improvements in reproducing experimental data after choosing a more suitable proximity energy for application to the GLDM. Encouraged by this, the <jats:italic>α</jats:italic> decay half-lives of even-even superheavy nuclei with <jats:italic>Z</jats:italic>=112-122 are predicted by the GLDM with a more suitable proximity energy. The predictions are consistent with calculations by the improved Royer formula and the universal decay law. In addition, the features of the predicted <jats:italic>α</jats:italic> decay half-lives imply that the next double magic nucleus after <jats:sup>208</jats:sup>Pb is <jats:sup>298</jats:sup>Fl. </jats:p>