Related papers: Feasibility studies for imaging e$^{+}$e$^{-}$ ann…

Novel Data Analysis Tool for the Evaluation of Coincidence Doppler Broadening Spectra of the Positron-Electron Annihilation Line

Coincidence Doppler Broadening Spectroscopy (CDBS) of the 511 keV annihilation line reveals the elemental signature at the annihilation site in matter. For this reason, CDBS enables the analysis of foreign atoms in the host matrix,…

Instrumentation and Detectors · Physics 2023-03-02 Leon Chryssos , Christoph Hugenschmidt

Hadron Production via e+e- Collisions with Initial State Radiation

A novel method of studying e+e- annihilation into hadrons using initial state radiation at e+e- colliders is described. After brief history of the method, its theoretical foundations are considered. Numerous experiments in which exclusive…

High Energy Physics - Experiment · Physics 2015-05-28 V. P. Druzhinin , S. I. Eidelman , S. I. Serednyakov , E. P. Solodov

Simulation studies of annihilation-photon's polarisation via Compton scattering with the J-PET tomograph

J-PET is the first positron-emission tomograph (PET) constructed from plastic scintillators. It was optimized for the detection of photons from electron-positron annihilation. Such photons, having an energy of 511 keV, interact with…

Instrumentation and Detectors · Physics 2019-09-04 N. Krawczyk , B. C. Hiesmayr , C. Curceanu , E. Czerwiński , K. Dulski , A. Gajos , M. Gorgol , N. Gupta-Sharma , B. Jasińska , K. Kacprzak , Ł. Kapłon , D. Kisielewska , K. Klimaszewski , G. Korcyl , P. Kowalski , T. Kozik , N. Krawczyk , W. Krzemień , E. Kubicz , M. Mohammed , Sz. Niedźwiecki , M. Pałka , M. Pawlik-Niedźwiecka , L. Raczyński , J. Raj , K. Rakoczy , Z. Rudy , S. Sharma , Shivani , R. Y. Shopa , M. Silarski , M. Skurzok , W. Wiślicki , B. Zgardzińska , P. Moskal

Human Tissues Investigation Using PALS Technique

Samples of uterine leiomyomatis and normal tissues taken from patients after surgery were investigated using the Positron Annihilation Lifetime Spectroscopy (PALS). Significant differences in all PALS parameters between normal and diseased…

Medical Physics · Physics 2017-11-15 B. Jasińska , B. Zgardzińska , G. Chołubek , M. Gorgol , K. Wiktor , K. Wysogld , P. Białas , C. Curceanu , E. Czerwiński , K. Dulski , A. Gajos , B. Głowacz , B. Hiesmayr , B. Jodłowska-Jędrych , D. Kamińska , G. Korcyl , P. Kowalski , T. Kozik , N. Krawczyk , W. Krzemień , E. Kubicz , M. Mohammed , M. Pawlik-Niedźwiecka , S. Niedźwiecki , M. Pałka , L. Raczyński , Z. Rudy , N. G. Sharma , S. Sharma , R. Shopa , M. Silarski , M. Skurzok , A. Wieczorek , H. Wiktor , W. Wiślicki , M. Zieliński , P. Moskal

Study of photon detection efficiency and position resolution of BESIII electromagnetic calorimeter

We study the photon detection efficiency and position resolution of the electromagnetic calorimeter (EMC) of the BESIII experiment. The control sample of the initial-state-radiation (ISR) process of $e^+e^-\rightarrow \gamma \mu^+\mu^-$ is…

High Energy Physics - Experiment · Physics 2018-10-04 Vindhyawasini Prasad , Chunxiu Liu , Xiaobin Ji , Weidong Li , Huaimin Liu , Xinchou Lou

Interpretation of AMS-02 Results: Correlations among Dark Matter Signals

The AMS-02 collaboration has recently released data on the positron fraction $e^+/(e^-+e^+)$ up to energies of about 350 GeV. If one insists on interpreting the observed excess as a dark matter signal, then we find it is best described by a…

High Energy Physics - Phenomenology · Physics 2013-05-06 Andrea De Simone , Antonio Riotto , Wei Xue

Segmented scintillation detectors with silicon photomultiplier readout for measuring antiproton annihilations

The Atomic Spectroscopy and Collisions Using Slow Antiprotons (ASACUSA) experiment at the Antiproton Decelerator (AD) facility of CERN constructed segmented scintillators to detect and track the charged pions which emerge from antiproton…

Instrumentation and Detectors · Physics 2014-03-04 A. Sótér , K. Todoroki , T. Kobayashi , D. Barna , D. Horvath , M. Hori

Search for invisible decays of a dark photon using $e^+e^-$ annihilation data at BESIII

We report a search for a dark photon using $14.9$~fb$^{-1}$ of $e^+e^-$ annihilation data taken at center-of-mass energies from 4.13 to 4.60~GeV with the BESIII detector operated at the BEPCII storage ring. The dark photon is assumed to be…

High Energy Physics - Experiment · Physics 2023-03-03 BESIII Collaboration , M. Ablikim , M. N. Achasov , P. Adlarson , M. Albrecht , R. Aliberti , A. Amoroso , M. R. An , Q. An , X. H. Bai , Y. Bai , O. Bakina , R. Baldini Ferroli , I. Balossino , Y. Ban , V. Batozskaya , D. Becker , K. Begzsuren , N. Berger , M. Bertani , D. Bettoni , F. Bianchi , J. Bloms , A. Bortone , I. Boyko , R. A. Briere , A. Brueggemann , H. Cai , X. Cai , A. Calcaterra , G. F. Cao , N. Cao , S. A. Cetin , J. F. Chang , W. L. Chang , G. Chelkov , C. Chen , Chao Chen , G. Chen , H. S. Chen , M. L. Chen , S. J. Chen , S. M. Chen , T. Chen , X. R. Chen , X. T. Chen , Y. B. Chen , Z. J. Chen , W. S. Cheng , S. K. Choi , X. Chu , G. Cibinetto , F. Cossio , J. J. Cui , H. L. Dai , J. P. Dai , A. Dbeyssi , R. E. de Boer , D. Dedovich , Z. Y. Deng , A. Denig , I. Denysenko , M. Destefanis , F. De Mori , Y. Ding , J. Dong , L. Y. Dong , M. Y. Dong , X. Dong , S. X. Du , P. Egorov , Y. L. Fan , J. Fang , S. S. Fang , W. X. Fang , Y. Fang , R. Farinelli , L. Fava , F. Feldbauer , G. Felici , C. Q. Feng , J. H. Feng , K Fischer , M. Fritsch , C. Fritzsch , C. D. Fu , H. Gao , Y. N. Gao , Yang Gao , S. Garbolino , I. Garzia , P. T. Ge , Z. W. Ge , C. Geng , E. M. Gersabeck , A Gilman , K. Goetzen , L. Gong , W. X. Gong , W. Gradl , M. Greco , L. M. Gu , M. H. Gu , Y. T. Gu , C. Y Guan , A. Q. Guo , L. B. Guo , R. P. Guo , Y. P. Guo , A. Guskov , T. T. Han , W. Y. Han , X. Q. Hao , F. A. Harris , K. K. He , K. L. He , F. H. Heinsius , C. H. Heinz , Y. K. Heng , C. Herold , Himmelreich , M. Himmelreich , G. Y. Hou , Y. R. Hou , Z. L. Hou , H. M. Hu , J. F. Hu , T. Hu , Y. Hu , G. S. Huang , K. X. Huang , L. Q. Huang , L. Q. Huang , X. T. Huang , Y. P. Huang , Z. Huang , T. Hussain , N Hüsken , W. Imoehl , M. Irshad , J. Jackson , S. Jaeger , S. Janchiv , E. Jang , J. H. Jeong , Q. Ji , Q. P. Ji , X. B. Ji , X. L. Ji , Y. Y. Ji , Z. K. Jia , H. B. Jiang , S. S. Jiang , X. S. Jiang , Y. Jiang , J. B. Jiao , Z. Jiao , S. Jin , Y. Jin , M. Q. Jing , T. Johansson , N. Kalantar-Nayestanaki , X. S. Kang , R. Kappert , B. C. Ke , I. K. Keshk , A. Khoukaz , R. Kiuchi , R. Kliemt , L. Koch , O. B. Kolcu , B. Kopf , M. Kuemmel , M. Kuessner , A. Kupsc , W. Kühn , J. J. Lane , J. S. Lange , P. Larin , A. Lavania , L. Lavezzi , Z. H. Lei , H. Leithoff , M. Lellmann , T. Lenz , C. Li , C. Li , C. H. Li , Cheng Li , D. M. Li , F. Li , G. Li , H. Li , H. Li , H. B. Li , H. J. Li , H. N. Li , J. Q. Li , J. S. Li , J. W. Li , Ke Li , L. J Li , L. K. Li , Lei Li , M. H. Li , P. R. Li , S. X. Li , S. Y. Li , T. Li , W. D. Li , W. G. Li , X. H. Li , X. L. Li , Xiaoyu Li , Z. X. Li , H. Liang , H. Liang , H. Liang , Y. F. Liang , Y. T. Liang , G. R. Liao , L. Z. Liao , J. Libby , A. Limphirat , C. X. Lin , D. X. Lin , T. Lin , B. J. Liu , C. X. Liu , D. Liu , F. H. Liu , Fang Liu , Feng Liu , G. M. Liu , H. Liu , H. B. Liu , H. M. Liu , Huanhuan Liu , Huihui Liu , J. B. Liu , J. L. Liu , J. Y. Liu , K. Liu , K. Y. Liu , Ke Liu , L. Liu , Lu Liu , M. H. Liu , P. L. Liu , Q. Liu , S. B. Liu , T. Liu , W. K. Liu , W. M. Liu , X. Liu , Y. Liu , Y. B. Liu , Z. A. Liu , Z. Q. Liu , X. C. Lou , F. X. Lu , H. J. Lu , J. G. Lu , X. L. Lu , Y. Lu , Y. P. Lu , Z. H. Lu , C. L. Luo , M. X. Luo , T. Luo , X. L. Luo , X. R. Lyu , Y. F. Lyu , F. C. Ma , H. L. Ma , L. L. Ma , M. M. Ma , Q. M. Ma , R. Q. Ma , R. T. Ma , X. Y. Ma , Y. Ma , F. E. Maas , M. Maggiora , S. Maldaner , S. Malde , Q. A. Malik , A. Mangoni , Y. J. Mao , Z. P. Mao , S. Marcello , Z. X. Meng , G. Mezzadri , H. Miao , T. J. Min , R. E. Mitchell , X. H. Mo , N. Yu. Muchnoi , Y. Nefedov , F. Nerling , I. B. Nikolaev , Z. Ning , S. Nisar , Y. Niu , S. L. Olsen , Q. Ouyang , S. Pacetti , X. Pan , Y. Pan , A. Pathak , A. Pathak , M. Pelizaeus , H. P. Peng , K. Peters , J. L. Ping , R. G. Ping , S. Plura , S. Pogodin , V. Prasad , F. Z. Qi , H. Qi , H. R. Qi , M. Qi , T. Y. Qi , S. Qian , W. B. Qian , Z. Qian , C. F. Qiao , J. J. Qin , L. Q. Qin , X. P. Qin , X. S. Qin , Z. H. Qin , J. F. Qiu , S. Q. Qu , S. Q. Qu , K. H. Rashid , C. F. Redmer , K. J. Ren , A. Rivetti , V. Rodin , M. Rolo , G. Rong , Ch. Rosner , S. N. Ruan , H. S. Sang , A. Sarantsev , Y. Schelhaas , C. Schnier , K. Schoenning , M. Scodeggio , K. Y. Shan , W. Shan , X. Y. Shan , J. F. Shangguan , L. G. Shao , M. Shao , C. P. Shen , H. F. Shen , X. Y. Shen , B. A. Shi , H. C. Shi , J. Y. Shi , q. q. Shi , R. S. Shi , X. Shi , X. D Shi , J. J. Song , W. M. Song , Y. X. Song , S. Sosio , S. Spataro , F. Stieler , K. X. Su , P. P. Su , Y. J. Su , G. X. Sun , H. Sun , H. K. Sun , J. F. Sun , L. Sun , S. S. Sun , T. Sun , W. Y. Sun , X Sun , Y. J. Sun , Y. Z. Sun , Z. T. Sun , Y. H. Tan , Y. X. Tan , C. J. Tang , G. Y. Tang , J. Tang , L. Y Tao , Q. T. Tao , M. Tat , J. X. Teng , V. Thoren , W. H. Tian , Y. Tian , I. Uman , B. Wang , B. L. Wang , C. W. Wang , D. Y. Wang , F. Wang , H. J. Wang , H. P. Wang , K. Wang , L. L. Wang , M. Wang , M. Z. Wang , Meng Wang , S. Wang , S. Wang , T. Wang , T. J. Wang , W. Wang , W. H. Wang , W. P. Wang , X. Wang , X. F. Wang , X. L. Wang , Y. Wang , Y. D. Wang , Y. F. Wang , Y. H. Wang , Y. Q. Wang , Yaqian Wang , Z. Wang , Z. Y. Wang , Ziyi Wang , D. H. Wei , F. Weidner , S. P. Wen , D. J. White , U. Wiedner , G. Wilkinson , M. Wolke , L. Wollenberg , J. F. Wu , L. H. Wu , L. J. Wu , X. Wu , X. H. Wu , Y. Wu , Z. Wu , L. Xia , T. Xiang , D. Xiao , G. Y. Xiao , H. Xiao , S. Y. Xiao , Y. L. Xiao , Z. J. Xiao , C. Xie , X. H. Xie , Y. Xie , Y. G. Xie , Y. H. Xie , Z. P. Xie , T. Y. Xing , C. F. Xu , C. J. Xu , G. F. Xu , H. Y. Xu , Q. J. Xu , X. P. Xu , Y. C. Xu , Z. P. Xu , F. Yan , L. Yan , W. B. Yan , W. C. Yan , H. J. Yang , H. L. Yang , H. X. Yang , L. Yang , S. L. Yang , Tao Yang , Y. F. Yang , Y. X. Yang , Yifan Yang , M. Ye , M. H. Ye , J. H. Yin , Z. Y. You , B. X. Yu , C. X. Yu , G. Yu , T. Yu , X. D. Yu , C. Z. Yuan , L. Yuan , S. C. Yuan , X. Q. Yuan , Y. Yuan , Z. Y. Yuan , C. X. Yue , A. A. Zafar , F. R. Zeng , X. Zeng Zeng , Y. Zeng , Y. H. Zhan , A. Q. Zhang , B. L. Zhang , B. X. Zhang , D. H. Zhang , G. Y. Zhang , H. Zhang , H. H. Zhang , H. H. Zhang , H. Y. Zhang , J. L. Zhang , J. Q. Zhang , J. W. Zhang , J. X. Zhang , J. Y. Zhang , J. Z. Zhang , Jianyu Zhang , Jiawei Zhang , L. M. Zhang , L. Q. Zhang , Lei Zhang , P. Zhang , Q. Y. Zhang , Shuihan Zhang , Shulei Zhang , X. D. Zhang , X. M. Zhang , X. Y. Zhang , X. Y. Zhang , Y. Zhang , Y. T. Zhang , Y. H. Zhang , Yan Zhang , Yao Zhang , Z. H. Zhang , Z. Y. Zhang , Z. Y. Zhang , G. Zhao , J. Zhao , J. Y. Zhao , J. Z. Zhao , Lei Zhao , Ling Zhao , M. G. Zhao , Q. Zhao , S. J. Zhao , Y. B. Zhao , Y. X. Zhao , Z. G. Zhao , A. Zhemchugov , B. Zheng , J. P. Zheng , Y. H. Zheng , B. Zhong , C. Zhong , X. Zhong , H. Zhou , L. P. Zhou , X. Zhou , X. K. Zhou , X. R. Zhou , X. Y. Zhou , Y. Z. Zhou , J. Zhu , K. Zhu , K. J. Zhu , L. X. Zhu , S. H. Zhu , S. Q. Zhu , T. J. Zhu , W. J. Zhu , Y. C. Zhu , Z. A. Zhu , B. S. Zou , J. H. Zou

State-Selective High-Energy Excitation of Nuclei by Resonant Positron Annihilation

In the annihilation of a positron with a bound atomic electron, the virtual gamma photon created may excite the atomic nucleus. We put forward this effect as a spectroscopic tool for an energy-selective excitation of nuclear transitions.…

Nuclear Theory · Physics 2018-05-09 N. A. Belov , Z. Harman

Exponentially Damped Breit-Pauli Hamiltonian for the Description of Positronium Decay and Other High-energy Processes

The conventional explanation for the 1.022 MeV decay of positronium in terms of the annihilation of an electron and its antiparticle is questioned because of the impossibility of proving experimentally that matter actually disappears.…

General Physics · Physics 2015-06-26 Robert J. Buenker

Mapping extragalactic dark matter structures through gamma-rays

If dark matter is composed of neutralinos, the gamma-ray radiation produced in their annihilation offers an attractive possibility for dark matter detection. This process may contribute significantly to the extragalactic gamma-ray…

Cosmology and Nongalactic Astrophysics · Physics 2010-01-20 Jesus Zavala , Volker Springel , Michael Boylan-Kolchin

Many-body aspects of positron annihilation in the electron gas

We investigate positron annihilation in electron liquid as a case study for many-body theory, in particular the optimized Fermi Hypernetted Chain (FHNC-EL) method. We examine several approximation schemes and show that one has to go up to…

Condensed Matter · Physics 2010-09-24 V. Apaja , S. Denk , E. Krotscheck

Ortho-positronium observation in the Double Chooz Experiment

The Double Chooz experiment measures the neutrino mixing angle $\theta_{13}$ by detecting reactor $\bar{\nu}_e$ via inverse beta decay. The positron-neutron space and time coincidence allows for a sizable background rejection, nonetheless…

Instrumentation and Detectors · Physics 2014-10-08 Y. Abe , J. C. dos Anjos , J. C. Barriere , E. Baussan , I. Bekman , M. Bergevin , T. J. C. Bezerra , L. Bezrukov , E. Blucher , C. Buck , J. Busenitz , A. Cabrera , E. Caden , L. Camilleri , R. Carr , M. Cerrada , P. -J. Chang , E. Chauveau , P. Chimenti , A. P. Collin , E. Conover , J. M. Conrad , J. I. Crespo-Anadon , K. Crum , A. S. Cucoanes , E. Damon , J. V. Dawson , J. Dhooghe , D. Dietrich , Z. Djurcic , M. Dracos , M. Elnimr , A. Etenko , M. Fallot , F. von Feilitzsch , J. Felde , S. M. Fernandes , V. Fischer , D. Franco , M. Franke , H. Furuta , I. Gil-Botella , L. Giot , M. Goger-Neff , L. F. G. Gonzalez , L. Goodenough , M. C. Goodman , C. Grant , N. Haag , T. Hara , J. Haser , M. Hofmann , G. A. Horton-Smith , A. Hourlier , M. Ishitsuka , J. Jochum , C. Jollet , F. Kaether , L. N. Kalousis , Y. Kamyshkov , D. M. Kaplan , T. Kawasaki , E. Kemp , H. de Kerret , D. Kryn , M. Kuze , T. Lachenmaier , C. E. Lane , T. Lasserre , A. Letourneau , D. Lhuillier , H. P. Lima , M. Lindner , J. M. Lopez-Castano , J. M. LoSecco , B. Lubsandorzhiev , S. Lucht , J. Maeda , C. Mariani , J. Maricic , J. Martino , T. Matsubara , G. Mention , A. Meregaglia , T. Miletic , R. Milincic , A. Minotti , Y. Nagasaka , Y. Nikitenko , P. Novella , L. Oberauer , M. Obolensky , A. Onillon , A. Osborn , C. Palomares , I. M. Pepe , S. Perasso , P. Pfahler , A. Porta , G. Pronost , J. Reichenbacher , B. Reinhold , M. Rohling , R. Roncin , S. Roth , B. Rybolt , Y. Sakamoto , R. Santorelli , A. C. Schilithz , S. Schonert , S. Schoppmann , M. H. Shaevitz , R. Sharankova , S. Shimojima , D. Shrestha , V. Sibille , V. Sinev , M. Skorokhvatov , E. Smith , J. Spitz , A. Stahl , I. Stancu , L. F. F. Stokes , M. Strait , A. Stuken , F. Suekane , S. Sukhotin , T. Sumiyoshi , Y. Sun , R. Svoboda , K. Terao , A. Tonazzo , H. H. Trinh Thi , G. Valdiviesso , N. Vassilopoulos , C. Veyssiere , M. Vivier , S. Wagner , N. Walsh , H. Watanabe , C. Wiebusch , L. Winslow , M. Wurm , G. Yang , F. Yermia , V. Zimmer

Indirect detection of light neutralino dark matter in the NMSSM

We explore the prospects for indirect detection of neutralino dark matter in supersymmetric models with an extended Higgs sector (NMSSM). We compute, for the first time, one-loop amplitudes for NMSSM neutralino pair annihilation into two…

High Energy Physics - Phenomenology · Physics 2008-11-26 Francesc Ferrer , Lawrence M. Krauss , Stefano Profumo

Radiative corrections in proton--antiproton annihilation to electron-positron and their application to the PANDA experiment

Radiative corrections to the annihilation of proton--antiproton into electron--positron are revisited, including virtual and real (soft and hard) photon emission. This issue is relevant for the time-like form factors measurements planned at…

High Energy Physics - Phenomenology · Physics 2020-03-18 Yu. M. Bystritskiy , V. A. Zykunov , A. Dbeyssi , M. Zambrana , F. Maas , E. Tomasi-Gustafsson

Ultra-short, MeV-scale laser-plasma positron source for positron annihilation lifetime spectroscopy

Sub-micron defects represent a well-known fundamental problem in manufacturing since they can significantly affect performance and lifetime of virtually any high-value component. Positron annihilation lifetime spectroscopy is arguably the…

Accelerator Physics · Physics 2021-07-28 Thomas L. Audet , Aaron Alejo , Luke Calvin , Mark Hugh Cunningham , Glenn Ross Frazer , Nasr A. M. Hafz , Christos Kamperidis , Song Li , Gagik Nersisyan , Daniel Papp , Michael Phipps , Jonathan Richard Warwick , Gianluca Sarri

Positron Annihilation Lifetime Spectroscopy Using Fast Scintillators and Digital Electronics

Positron Annihilation Lifetime Spectroscopy (PALS) is a non-destructive radiological technique widely used in material science studies. PALS typically relies on an analog coincidence measurement setup and allows the estimate of the positron…

Instrumentation and Detectors · Physics 2019-08-14 Ming Fang , Nathan Bartholomew , Angela Di Fulvio

Initial state radiation in $e^+e^-$ annihilation

In two earlier papers it was demonstrated that Lorentzian and Galilean symmetries could both be useful in the analysis of the annihilation reaction $e^+ e^- \to \gamma \Lambda(\rightarrow p\pi^-) \bar{\Lambda}(\rightarrow \bar{p}\pi^+)$. It…

High Energy Physics - Phenomenology · Physics 2023-04-25 Göran Fäldt

A model for positron annihilation in multi-layer systems by solving the diffusion equation using different positron affinities

We present a method for solving the positron diffusion equation in multi-layer systems. Our approach incorporates material-specific implantation profiles, diffusion parameters, and positron affinities. It utilizes a Markov chain approach to…

Materials Science · Physics 2025-11-06 Lucian Mathes , Michael Göldl , Michael Leitner , Bettina Kohlhaas , Maximilian Suhr , Vassily Vadimovitch Burwitz , Armin Manhard , Christoph Hugenschmidt

Studies Of The Polarization Of Gamma Photons Originating From The Decay of Positronium Atoms

The precise measurements of the Compton scatterings of photons originating from the decay of positronium atoms can reveal information about their polarizations. J-PET detector is constructed of 192 plastic scintillators and is unique to…

Instrumentation and Detectors · Physics 2020-01-29 Sushil K. Sharma , Nikodem Krawczyk , Juhi Raj