Catálogo de publicaciones - revistas

<jats:title>Abstract</jats:title> <jats:p>We explore the Kibble-Zurek scaling of conserved charge using stochastic diffusion dynamics. The characteristic scales <jats:inline-formula> <jats:tex-math><?CDATA $ \tau_{\rm{KZ}}$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_8_084103_M403.jpg" xlink:type="simple" /> </jats:inline-formula> and <jats:inline-formula> <jats:tex-math><?CDATA $ l_{\rm{KZ}}$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_8_084103_M402.jpg" xlink:type="simple" /> </jats:inline-formula> are determined and used to properly rescale the traditional correlation function and cumulant. We construct universal functions for the two-point correlation <jats:inline-formula> <jats:tex-math><?CDATA $ C(y_1-y_2;\tau)$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_8_084103_M401.jpg" xlink:type="simple" /> </jats:inline-formula> and the second-order cumulant <jats:inline-formula> <jats:tex-math><?CDATA $ K(\Delta y,\tau)$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_8_084103_M400.jpg" xlink:type="simple" /> </jats:inline-formula> of the conserved charge in the critical regime, both of which are, near the critical point, insensitive to both the initial temperature and a parameter in the mapping between the 3D Ising model and the hot QCD system. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>We investigate the extinction coefficients of the surface atmospheric aerosol over the Large High Altitude Air Shower Observatory (LHAASO), located at the Haizi Mountain, Daocheng County, China. To this end, we utilize the Longtin model, Mie scattering theory, and experimental data obtained by the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO). Our theoretical calculations show that the total extinction coefficients of the atmospheric aerosol at the wavelength of 200–500 nm are inversely proportional to the laser wavelength, and influenced by the wind speed. From July 2015 to October 2016, the extinction coefficient of the surface atmospheric aerosols at 532 nm wavelength reached 0.04 km<jats:sup>−1</jats:sup> with no wind, while it increased to 0.1 km<jats:sup>−1</jats:sup> with gusts. In this period, the extinction coefficients of the surface atmospheric aerosol at 532 nm wavelength, obtained by the CALIPSO, change from 0.01 to 0.07 km<jats:sup>−1</jats:sup>, which is less than the values obtained the theoretical calculation and larger than the average of Tibetan Plateau in 2006−2016. These calculations and experimental evidence provide important arguments to the model of atmospheric aerosol to be applied in the calibration of LHAASO. Our results suggest that the extinction coefficients over LHAASO require further study, including research on the size distribution, shape, concentration of aerosols particles, wind dependence, relative humidity dependence, etc. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>The precise spectrum of electrons and positrons at high energies plays an important role in understanding their origin. DArk Matter Particle Explorer has reported their first measurement of the <jats:inline-formula> <jats:tex-math><?CDATA $e^+e^- $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_8_085101_JY01.jpg" xlink:type="simple" /> </jats:inline-formula> spectrum from 25 GeV to 4.6 TeV. This spectrum reveals a tentative peak at ~1.4 TeV, which requires a nearby source of <jats:inline-formula> <jats:tex-math><?CDATA $e^+e^- $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_8_085101_JY02.jpg" xlink:type="simple" /> </jats:inline-formula>. In this work, we study the properties of a large nearby dark matter subhalo that accouns for this spectral peak, such as its mass and distance from Earth, for different concentration models. We compare spectra of the sources in 3FGL with that from DM annihilation in the subhalo, and find ten candidates that have comparable gamma-ray spectra. However, according to the <jats:italic>N</jats:italic>-body simulation, the probability that such a large subhalo is close enough to Earth is less than 0.1%. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>We study the theoretical constraints on a model whose scalar sector contains one color octet and one or two color singlet <jats:italic>SU</jats:italic>(2)<jats:sub> <jats:italic>L</jats:italic> </jats:sub> doublets. To ensure unitarity of the theory, we constrain the parameters of the scalar potential for the first time at the next-to-leading order in perturbation theory. Moreover, we derive new conditions guaranteeing the stability of the potential. We employ the HEPfit package to extract viable parameter regions at the electroweak scale and test the stability of the renormalization group evolution up to the multi-TeV region. Furthermore, we set upper limits on the scalar mass splittings. All results are given for both cases with and without a second scalar color singlet. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>The decay channel <jats:inline-formula> <jats:tex-math><?CDATA $ H\to\gamma\gamma $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093102_M3.jpg" xlink:type="simple" /> </jats:inline-formula> is an important channel for probing the properties of the Higgs boson. In this paper, we analyze its decay width by using the perturbative QCD corrections up to the <jats:inline-formula> <jats:tex-math><?CDATA $ \alpha_s^4 $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093102_M4.jpg" xlink:type="simple" /> </jats:inline-formula> order with the help of the principle of maximum conformality (PMC). PMC has been suggested in literature for eliminating the conventional renormalization scheme-and-scale ambiguities. After applying PMC, we observe that an accurate renormalization scale independent decay width <jats:inline-formula> <jats:tex-math><?CDATA $ \Gamma(H\to\gamma\gamma) $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093102_M5.jpg" xlink:type="simple" /> </jats:inline-formula> up to the N<jats:sup>4</jats:sup>LO level can be achieved. Taking the Higgs mass, <jats:inline-formula> <jats:tex-math><?CDATA $ M_{\rm H} = 125.09\pm $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093102_M6-1.jpg" xlink:type="simple" /> </jats:inline-formula> <jats:inline-formula> <jats:tex-math><?CDATA $ 0.21\pm0.11 $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093102_M6.jpg" xlink:type="simple" /> </jats:inline-formula> GeV, given by the ATLAS and CMS collaborations, we obtain <jats:inline-formula> <jats:tex-math><?CDATA $ \Gamma(H\to \gamma\gamma)|_{\rm LHC} = 9.364^{+0.076}_{-0.075} $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093102_M7.jpg" xlink:type="simple" /> </jats:inline-formula> KeV. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>Recently, the LHCb experiment announced the observation of hidden-charm pentaquark states <jats:inline-formula> <jats:tex-math><?CDATA $P_c(4312)$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093103_M1.jpg" xlink:type="simple" /> </jats:inline-formula>, <jats:inline-formula> <jats:tex-math><?CDATA $P_c(4440)$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093103_M2.jpg" xlink:type="simple" /> </jats:inline-formula>, and <jats:inline-formula> <jats:tex-math><?CDATA $P_c(4457)$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093103_M3.jpg" xlink:type="simple" /> </jats:inline-formula> near <jats:inline-formula> <jats:tex-math><?CDATA $ \Sigma_c \bar{D}$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093103_M4.jpg" xlink:type="simple" /> </jats:inline-formula> and <jats:inline-formula> <jats:tex-math><?CDATA $ \Sigma_c \bar{D}^\ast$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093103_M5.jpg" xlink:type="simple" /> </jats:inline-formula> thresholds. In this present work, we studied these pentaquarks in the framework of the nonrelativistic quark model with four types of potential. We solved five-body Schrödinger equation by using the artificial neural network method and made predictions of parities for these states, which are not yet determined by experiment. The mass of another possible pentaquark state near the <jats:inline-formula> <jats:tex-math><?CDATA $\bar{D}^\ast \Sigma_c^\ast$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093103_M6.jpg" xlink:type="simple" /> </jats:inline-formula> with <jats:inline-formula> <jats:tex-math><?CDATA $J^P=5/2^-$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093103_M7.jpg" xlink:type="simple" /> </jats:inline-formula> is also calculated. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>FCNC processes offer important tools to test the Standard Model (SM) and to search for possible new physics. In this work, we investigate the <jats:inline-formula> <jats:tex-math><?CDATA $s\to d\nu\bar{\nu}$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093104_M2.jpg" xlink:type="simple" /> </jats:inline-formula> rare hyperon decays in SM and beyond. We find that in SM the branching ratios for these rare hyperon decays range from <jats:inline-formula> <jats:tex-math><?CDATA $10^{-14}$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093104_M3.jpg" xlink:type="simple" /> </jats:inline-formula> to <jats:inline-formula> <jats:tex-math><?CDATA $10^{-11}$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093104_M4.jpg" xlink:type="simple" /> </jats:inline-formula> . When all the errors in the form factors are included, we find that the final branching ratios for most decay modes have an uncertainty of about 5% to 10%. After taking into account the contribution from new physics, the generalized SUSY extension of SM and the minimal 331 model, the decay widths for these channels can be enhanced by a factor of <jats:inline-formula> <jats:tex-math><?CDATA $2 \sim 7$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_093104_M5.jpg" xlink:type="simple" /> </jats:inline-formula>. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>The cross-sections for <jats:sup>46</jats:sup>Ti(n,2n)<jats:sup>45</jats:sup>Ti, <jats:sup>46</jats:sup>Ti(n,p)<jats:sup>46m+g</jats:sup>Sc+<jats:sup>47</jats:sup>Ti(n,d*)<jats:sup>46m+g</jats:sup>Sc, <jats:sup>46</jats:sup>Ti(n,p)<jats:sup>46m+g</jats:sup>Sc, <jats:sup>47</jats:sup>Ti(n,p)<jats:sup>47</jats:sup>Sc+<jats:sup>48</jats:sup>Ti(n,d*)<jats:sup>47</jats:sup>Sc, <jats:sup>47</jats:sup>Ti(n,p)<jats:sup>47</jats:sup>Sc, <jats:sup>48</jats:sup>Ti(n,p)<jats:sup>48</jats:sup>Sc+<jats:sup>49</jats:sup>Ti(n,d*)<jats:sup>48</jats:sup>Sc,<jats:sup>48</jats:sup>Ti(n,p)<jats:sup>48</jats:sup>Sc, and <jats:sup>50</jats:sup>Ti(n,α)<jats:sup>47</jats:sup>Ca reactions were investigated around neutron energies of 13.5–14.8 MeV by means of the activation technique. Fast neutrons were produced by the <jats:sup>3</jats:sup>H(d,n)<jats:sup>4</jats:sup>He reaction. Neutron energies from different directions in the measurements were obtained in advance using the method of cross-section ratios for <jats:sup>90</jats:sup>Zr(n,2n)<jats:sup>89m+g</jats:sup>Zr and <jats:sup>93</jats:sup>Nb(n,2n)<jats:sup>92m</jats:sup>Nb reactions. The results obtained are analyzed and compared with the experimental data provided by the literature and verified nuclear data in the JEFF-3.3, CENDL-3.1, ENDF/B-VIII.0 libraries, as well as results calculated by Talys-1.9 code. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>True ternary fission and Tin-accompanied ternary fission of <jats:sup>242</jats:sup>Pu are studied by using the 'Three Cluster Model'. True ternary fission is considered as a formation of heavy fragments in the region <jats:inline-formula> <jats:tex-math><?CDATA $ 28\leqslant Z_1,Z_2,Z_3\leqslant 38 $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_094101_M3.jpg" xlink:type="simple" /> </jats:inline-formula> with comparable masses. The possible fission channels are predicted by the potential-energy calculations. Interaction potentials, <jats:italic>Q</jats:italic>-values and relative yields for all possible fragmentations in equatorial and collinear configurations are calculated and compared. It is found that ternary fission with formation of a double magic nucleus like <jats:inline-formula> <jats:tex-math><?CDATA $ ^{132}{\rm Sn} $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_094101_M4.jpg" xlink:type="simple" /> </jats:inline-formula> is more probable than the other fragmentations. Also, the kinetic energies of the fragments for the group <jats:inline-formula> <jats:tex-math><?CDATA $ Z_1 = 32 $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_094101_M5.jpg" xlink:type="simple" /> </jats:inline-formula>, <jats:inline-formula> <jats:tex-math><?CDATA $ Z_2 = 32 $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_094101_M6.jpg" xlink:type="simple" /> </jats:inline-formula> and <jats:inline-formula> <jats:tex-math><?CDATA $ Z_3 = 30 $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_43_9_094101_M7.jpg" xlink:type="simple" /> </jats:inline-formula> are calculated for all combinations in the collinear geometry as a sequential decay. </jats:p>

<jats:title>Abstract</jats:title> <jats:p>Elastic scattering angular distributions and total reaction cross-sections of <jats:sup>7,10,11,12</jats:sup>Be projectiles are predicted by the systematic <jats:sup>9</jats:sup>Be global phenomenological optical model potential for target mass numbers ranging from 24 to 209. These predictions provide a detailed analysis by their comparison with the available experimental data. Furthermore, these elastic scattering observables are also predicted for some targets out of the mass number range. The results are in reasonable agreement with the existing experimental data, and they are presented in this study. </jats:p>