While the abundances of the final state hadrons in relativistic heavy-ion collisions are rather well described by the thermal particle production,the shape of the transverse momentum,pT,distribution below p_(T)≈500 M...While the abundances of the final state hadrons in relativistic heavy-ion collisions are rather well described by the thermal particle production,the shape of the transverse momentum,pT,distribution below p_(T)≈500 MeV/c,is still poorly understood.We propose a procedure to quantify the model-to-data differences using Bayesian inference techniques,which allows for consistent treatment of the experimental uncertainties and tests the completeness of the available hydrodynamic frameworks.Using relativistic fluid framework FluiduM with PCE coupled to TrENTo initial state and FasTrEso decays,we analyze p_(T)distribution of identified charged hadrons measured in heavy-ion collisions at top RHIC and the LHC energies and identify an excess of pions produced below p_(T)≈500 MeV/c.Our results provide new input for the interpretation of the pion excess as either missing components in the thermal particle yield description or as an evidence for a different particle production mechanism.展开更多
Cultures throughout the world are associating with the rivers.People depend upon the rivers and their tributaries for food,water,transport,and many other aspects of their daily lives.Unfortunately,human beings have no...Cultures throughout the world are associating with the rivers.People depend upon the rivers and their tributaries for food,water,transport,and many other aspects of their daily lives.Unfortunately,human beings have not calculated the accurate lengths for the great rivers even today.The lengths of the rivers are very different in popular textbooks,magazines,atlases and encyclopedias,etc.To accurately determine the lengths of the principal rivers of the world,the combination of satellite image analysis and field investigations to the source regions is proposed in this paper.The lengths of the Nile,Amazon,Yangtze,Mississippi,Yellow,Ob,Yenisey,Amur,Congo and Mekong,with lengths over or close to 5000 km,were calculated using the proposed method.The results may represent the most reliable and accurate lengths of the principal rivers of the world that are currently achievable.展开更多
文摘While the abundances of the final state hadrons in relativistic heavy-ion collisions are rather well described by the thermal particle production,the shape of the transverse momentum,pT,distribution below p_(T)≈500 MeV/c,is still poorly understood.We propose a procedure to quantify the model-to-data differences using Bayesian inference techniques,which allows for consistent treatment of the experimental uncertainties and tests the completeness of the available hydrodynamic frameworks.Using relativistic fluid framework FluiduM with PCE coupled to TrENTo initial state and FasTrEso decays,we analyze p_(T)distribution of identified charged hadrons measured in heavy-ion collisions at top RHIC and the LHC energies and identify an excess of pions produced below p_(T)≈500 MeV/c.Our results provide new input for the interpretation of the pion excess as either missing components in the thermal particle yield description or as an evidence for a different particle production mechanism.
基金supported by China High-Tech Research and Development Project(863 Project)the Innovation Project of Chinese Academy of Sciences,the Special Funds of Director General of Institute of Remote Sensing Applications,Chinese Academy of Sciences,the Funds of the State Key Laboratory of Remote Sensing Sciences of Chinathe Funds of the State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing of China and Earth&Space Awards of the Earth and Space Foundation.
文摘Cultures throughout the world are associating with the rivers.People depend upon the rivers and their tributaries for food,water,transport,and many other aspects of their daily lives.Unfortunately,human beings have not calculated the accurate lengths for the great rivers even today.The lengths of the rivers are very different in popular textbooks,magazines,atlases and encyclopedias,etc.To accurately determine the lengths of the principal rivers of the world,the combination of satellite image analysis and field investigations to the source regions is proposed in this paper.The lengths of the Nile,Amazon,Yangtze,Mississippi,Yellow,Ob,Yenisey,Amur,Congo and Mekong,with lengths over or close to 5000 km,were calculated using the proposed method.The results may represent the most reliable and accurate lengths of the principal rivers of the world that are currently achievable.
