We apply the recently developed concept of the nucleon energy-energy correlator(NEEC)for the gluon sector to investigate the long-range azimuthal angular correlations in proton-proton collisions at the Large Hadron Co...We apply the recently developed concept of the nucleon energy-energy correlator(NEEC)for the gluon sector to investigate the long-range azimuthal angular correlations in proton-proton collisions at the Large Hadron Collider.The spinning gluon in these collisions will introduce substantial nonzero cos(2φ)asymmetries in both Higgs boson and top quark pair productions,where φ is the azimuthal angle between the forward and backward energy correlators in the NEEC observables.The genesis of the cos(2φ)correlation lies in the intricate quantum entanglement.Owing to the substantial cos(2φ)effect,the NEEC observable in Higgs boson and tt production emerges as a pivotal avenue for delving into quantum entanglement and scrutinizing the Bell inequality at high-energy colliders.展开更多
In land-based spectral imaging,the spectra of ground objects are inevitably afected by the imaging conditions(weather conditions,atmospheric conditions,light conditions,zenith and azimuth angle conditions)and spatial ...In land-based spectral imaging,the spectra of ground objects are inevitably afected by the imaging conditions(weather conditions,atmospheric conditions,light conditions,zenith and azimuth angle conditions)and spatial distribution of targets,leading to uncertainties featured by“same object diferent spectrum”.That is,the spectrum of a ground object may change within a certain range under diferent imaging conditions.Traditional target detection(TD)methods are mainly based on similarity measurements and do not fully account for the spectral uncertainties.These detection methods are prone to false detections or missed detections.Therefore,reducing the impact of spectral uncertainties on TD is an important research topic in hyperspectral imaging.In this paper,we frst review traditional TD methods and compare their principles and characteristics.It is found that the spectral correlation angle(SCA)method has good adaptability in land-based imaging.The shortcoming of the SCA method that it cannot refect the local spectrum characteristics,is also analyzed.As the efect of spectral uncertainties cannot be completely overcome by the SCA method,a new similarity measurement method,the weighted spectral correlation angle(WSCA)method,is proposed.It can reduce the infuence of spectral uncertainties on TD by increasing the weight of particular bands.Finally,we use two sets of experiments to analyze the efect of the WSCA method on TD.Its performance in overcoming spectral uncertainties caused by variations in imaging conditions or uneven spatial distributions of targets is tested.The results show that the WSCA method can efectively reduce the infuence of spectral uncertainties and obtain a good detection result.展开更多
基金supported by the Natural Science Foundation of China under Contract No.12175016(X.L.)the Office of Science of the U.S.Department of Energy under Contract No.DE-AC02-05CH11231 and under the umbrella of the Quark-Gluon Tomography(QGT)Topical Collaboration with Award DE-SC0023646(Y.G.and F.Y.)+1 种基金the Startup Grant of Peking Universitythe Asian Young Scientist Fellowship(H.X.Z.).
文摘We apply the recently developed concept of the nucleon energy-energy correlator(NEEC)for the gluon sector to investigate the long-range azimuthal angular correlations in proton-proton collisions at the Large Hadron Collider.The spinning gluon in these collisions will introduce substantial nonzero cos(2φ)asymmetries in both Higgs boson and top quark pair productions,where φ is the azimuthal angle between the forward and backward energy correlators in the NEEC observables.The genesis of the cos(2φ)correlation lies in the intricate quantum entanglement.Owing to the substantial cos(2φ)effect,the NEEC observable in Higgs boson and tt production emerges as a pivotal avenue for delving into quantum entanglement and scrutinizing the Bell inequality at high-energy colliders.
基金supported by the National Natural Science Foundation of China(Grant No.62005319).
文摘In land-based spectral imaging,the spectra of ground objects are inevitably afected by the imaging conditions(weather conditions,atmospheric conditions,light conditions,zenith and azimuth angle conditions)and spatial distribution of targets,leading to uncertainties featured by“same object diferent spectrum”.That is,the spectrum of a ground object may change within a certain range under diferent imaging conditions.Traditional target detection(TD)methods are mainly based on similarity measurements and do not fully account for the spectral uncertainties.These detection methods are prone to false detections or missed detections.Therefore,reducing the impact of spectral uncertainties on TD is an important research topic in hyperspectral imaging.In this paper,we frst review traditional TD methods and compare their principles and characteristics.It is found that the spectral correlation angle(SCA)method has good adaptability in land-based imaging.The shortcoming of the SCA method that it cannot refect the local spectrum characteristics,is also analyzed.As the efect of spectral uncertainties cannot be completely overcome by the SCA method,a new similarity measurement method,the weighted spectral correlation angle(WSCA)method,is proposed.It can reduce the infuence of spectral uncertainties on TD by increasing the weight of particular bands.Finally,we use two sets of experiments to analyze the efect of the WSCA method on TD.Its performance in overcoming spectral uncertainties caused by variations in imaging conditions or uneven spatial distributions of targets is tested.The results show that the WSCA method can efectively reduce the infuence of spectral uncertainties and obtain a good detection result.
