This paper investigated the massive particle radiation from Gibbons-Maeda black hole by using a semi-classical method. The calculations showed that, if the self-gravitation of the radiated particle is taken into accou...This paper investigated the massive particle radiation from Gibbons-Maeda black hole by using a semi-classical method. The calculations showed that, if the self-gravitation of the radiated particle is taken into account, the radiation spectrum deviates from exact black body spectrum and the rate of tunneling equals precisely the exponent of the difference of the black hole entropies before and after emission. The conclusion supports the viewpoint of information conservation.展开更多
This study set out to investigate charged vector particles tunneling via horizons of a pair of accelerating rotating charged NUT black holes under the influence of quantum gravity.To this end,we use the modified Proca...This study set out to investigate charged vector particles tunneling via horizons of a pair of accelerating rotating charged NUT black holes under the influence of quantum gravity.To this end,we use the modified Proca equation incorporating generalized uncertainty principle.Applying the WKB approximation to the field equation,we obtain a modified tunneling rate and the corresponding corrected Hawking temperature for this black hole.Moreover,we analyze the graphical behavior of the corrected Hawking temperature T'_H with respect to the event horizon for the given black hole.By considering quantum gravitational effects on Hawking temperatures,we discuss the stability analysis of this black hole.For a pair of black holes,the temperature T'_H increases with the increase in rotation parameters a andω,correction parameterβ,black hole acceleration a,and arbitrary parameter k,and decreases with the increase in electric e and magnetic charges g.展开更多
This article presents an extensive review of the status of the search of the dark matter. The first eight sections are devoted to topics in dark matter and its experimental searches, and the rest to selected topics in...This article presents an extensive review of the status of the search of the dark matter. The first eight sections are devoted to topics in dark matter and its experimental searches, and the rest to selected topics in astrophysics and cosmology, which are intended to supply some of the needed background for students in particle physics. Sections 9 and 13 are introductory cosmology. The three astrophysical topics, Big Bang nucleosynthesis Section 10, Boltzmann transport equation and freeze out of massive particles Section 11, and CMB anisotropy Section 12 can all be studied in analytical approaches when reasonable approximations are made. Their original analytically forms, to which this article follows very closely, were given by particle physicists. Dark matter is an evolving subject requiring timely update to stay current. Hence a review of such a subject matter would undoubtedly have something wanting when it appears in print. It is hoped that this review can form a humble basis for those graduate students who would like to pursue the subject of dark matter. The reader can use the extensive table of contents to see in some details the materials covered in the article.展开更多
The nature of dark matter is one of the greatest mysteries in modern physics and astronomy.A wide variety of experiments have been carried out worldwide to search for the evidence of particle dark matter.Chinese physi...The nature of dark matter is one of the greatest mysteries in modern physics and astronomy.A wide variety of experiments have been carried out worldwide to search for the evidence of particle dark matter.Chinese physicists started experimental search for dark matter about ten years ago,and have produced results with high scientific impact.In this paper,we present an overview of the dark matter program in China,and discuss recent results and future directions.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No. 10847166)
文摘This paper investigated the massive particle radiation from Gibbons-Maeda black hole by using a semi-classical method. The calculations showed that, if the self-gravitation of the radiated particle is taken into account, the radiation spectrum deviates from exact black body spectrum and the rate of tunneling equals precisely the exponent of the difference of the black hole entropies before and after emission. The conclusion supports the viewpoint of information conservation.
基金financial support provided under the Chilean FONDECYT(3170035)
文摘This study set out to investigate charged vector particles tunneling via horizons of a pair of accelerating rotating charged NUT black holes under the influence of quantum gravity.To this end,we use the modified Proca equation incorporating generalized uncertainty principle.Applying the WKB approximation to the field equation,we obtain a modified tunneling rate and the corresponding corrected Hawking temperature for this black hole.Moreover,we analyze the graphical behavior of the corrected Hawking temperature T'_H with respect to the event horizon for the given black hole.By considering quantum gravitational effects on Hawking temperatures,we discuss the stability analysis of this black hole.For a pair of black holes,the temperature T'_H increases with the increase in rotation parameters a andω,correction parameterβ,black hole acceleration a,and arbitrary parameter k,and decreases with the increase in electric e and magnetic charges g.
文摘This article presents an extensive review of the status of the search of the dark matter. The first eight sections are devoted to topics in dark matter and its experimental searches, and the rest to selected topics in astrophysics and cosmology, which are intended to supply some of the needed background for students in particle physics. Sections 9 and 13 are introductory cosmology. The three astrophysical topics, Big Bang nucleosynthesis Section 10, Boltzmann transport equation and freeze out of massive particles Section 11, and CMB anisotropy Section 12 can all be studied in analytical approaches when reasonable approximations are made. Their original analytically forms, to which this article follows very closely, were given by particle physicists. Dark matter is an evolving subject requiring timely update to stay current. Hence a review of such a subject matter would undoubtedly have something wanting when it appears in print. It is hoped that this review can form a humble basis for those graduate students who would like to pursue the subject of dark matter. The reader can use the extensive table of contents to see in some details the materials covered in the article.
基金The authors thank Prof,Qian Yue and Dr.Litao Yang from Tsinghua University,and also appreciate Prof.Jin Chang frorm Purple Mountain Obeservatory for their generous help with the content of this paper.This work was supported in part by the Double First Class plan of the Shanghai Jiao Tong University,the Koy Laboratory for Particle Physics and Cosmology,Ministry of Education,and the Chinese Academy of Sciences Center for Ex-cellence in Particle Physics.We also thank supportse from the Na-tiounal Natural Selenee Foundaution of China,Ministry of Selenee and Technology,Ofice of Science and Technology,Shanghai Municipal Government,and the Hongkong Hongwen Foundation and Tencent Punlaliu in Chia.
文摘The nature of dark matter is one of the greatest mysteries in modern physics and astronomy.A wide variety of experiments have been carried out worldwide to search for the evidence of particle dark matter.Chinese physicists started experimental search for dark matter about ten years ago,and have produced results with high scientific impact.In this paper,we present an overview of the dark matter program in China,and discuss recent results and future directions.
