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Search for Darkonium in $e^+e^-$ Collisions
/ BABAR Collaboration
Collider searches for dark sectors, new particles interacting only feebly with ordinary matter, have largely focused on identifying signatures of new mediators, leaving much of dark sector structures unexplored. In particular, the existence of dark matter bound states (darkonia) remains to be investigated. [...]
arXiv:2106.08529; BABAR-PUB-21/002; SLAC-PUB-17608.-
2022-01-11 - 10 p.
- Published in : Phys. Rev. Lett. 128 (2022) 021802
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The eXtreme-DataCloud project solutions for data management services in distributed e-infrastructures
/ Cesini, Daniele (INFN, Bologna) ; Donvito, Giacinto (INFN, Bari) ; Costantini, Alessandro (INFN, Bologna) ; Aguilar Gomez, Fernando (Cantabria Inst. of Phys.) ; Duma, Doina Cristina (INFN, Bologna) ; Fuhrmann, Patrick (DESY) ; Dutka, Lukasz (AGH-UST, Cracow) ; Viljolen, Matthew (EGI Foundation, Amsterdam) ; Battaglia, Serena (ECRIN, Paris) ; Poireau, Vincent (Annecy, LAPP) et al.
The eXtreme DataCloud (XDC) project is aimed at developing data management services capable to cope with very large data resources allowing the future e-infrastructures to address the needs of the next generation extreme scale scientific experiments. Started in November 2017, XDC is combining the expertise of 8 large European research organisations. [...]
2020 - 6 p.
- Published in : EPJ Web Conf. 245 (2020) 04010
Fulltext from publisher: PDF;
In : 24th International Conference on Computing in High Energy and Nuclear Physics, Adelaide, Australia, 4 - 8 Nov 2019, pp.04010
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Advancements in data management services for distributed e-infrastructures: the eXtreme-DataCloud project
/ Cesini, Daniele (INFN, Bologna) ; Donvito, Giacinto (INFN, Bari) ; Costantini, Alessandro (INFN, Bologna) ; Aguilar Gomez, Fernando (Cantabria Inst. of Phys.) ; Duma, Doina Cristina (INFN, Bologna) ; Fuhrmann, Patrick (DESY) ; Dutka, Lukasz (AGH-UST, Cracow) ; Viljolen, Matthew (Unlisted, NL) ; Battaglia, Serena (Unlisted, FR) ; Poireau, Vincent (Annecy, LAPP) et al.
The development of data management services capable to cope with very large data resources is a key challenge to allow the future e-infrastructures to address the needs of the next generation extreme scale scientific experiments. To face this challenge, in November 2017 the H2020 eXtreme DataCloud - XDC project has been launched. [...]
2019 - 8 p.
- Published in : EPJ Web Conf. 214 (2019) 04044
Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.04044
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Towards Understanding the Origin of Cosmic-Ray Electrons
/ Aguilar, M (Madrid, CIEMAT) ; Ali Cavasonza, L (IAS, Julich ; JCHP, Julich) ; Alpat, B (INFN, Perugia ; Perugia U.) ; Ambrosi, G (INFN, Perugia ; Perugia U.) ; Arruda, L (LIP, Lisbon) ; Attig, N (IAS, Julich ; JCHP, Julich) ; Azzarello, P (Geneva U.) ; Bachlechner, A (IAS, Julich ; JCHP, Julich) ; Barao, F (LIP, Lisbon) ; Barrau, A (LPSC, Grenoble) et al.
/AMS
Precision results on cosmic-ray electrons are presented in the energy range from 0.5 GeV to 1.4 TeV based on 28.1×106 electrons collected by the Alpha Magnetic Spectrometer on the International Space Station. In the entire energy range the electron and positron spectra have distinctly different magnitudes and energy dependences. [...]
2019 - 9 p.
- Published in : Phys. Rev. Lett. 122 (2019) 101101
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Towards Understanding the Origin of Cosmic-Ray Positrons
/ Aguilar, M (Madrid, CIEMAT) ; Ali Cavasonza, L (IAS, Julich ; JCHP, Julich) ; Ambrosi, G (INFN, Perugia) ; Arruda, L (LIP, Lisbon) ; Attig, N (IAS, Julich ; JCHP, Julich) ; Azzarello, P (Geneva U.) ; Bachlechner, A (IAS, Julich ; JCHP, Julich) ; Barao, F (LIP, Lisbon) ; Barrau, A (LPSC, Grenoble) ; Barrin, L (CERN) et al.
/AMS
Precision measurements of cosmic ray positrons by the Alpha Magnetic Spectrometer on the International Space Station are presented up to 1 TeV based on 1.9 million positrons.The positron flux exhibits a significant excess starting from $25.2 \pm 1.8$ GeV followed by a sharp drop-off above $284^{+91}_{-64}$ GeV.In the entire energy range the positron flux is well described by the sum of a diffuse termassociated with low energy secondary positrons produced in the collision of cosmic rays, and a new source term of high energy positrons with a finite energy cutoff. The finite cutoff energy of the source term, $E_s$, is established with a significance of more than $4 \sigma$, and it's value is determined to be $E_s = 810^{+310}_{-180}$ GeV.These experimental data on cosmic ray positrons show that, at high energies, they predominantly originate either from dark matter collisions or from new astrophysical sources..
2019 - 9 p.
- Published in : Phys. Rev. Lett. 122 (2019) 041102
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The eXtreme-DataCloud project: data management services for the next generation distributed e-infrastructures
/ Cesini, Daniele (INFN, CNAF) ; Costantini, Alessandro (INFN, CNAF) ; Fuhrmann, Patrick (DESY) ; Aguilar, Fernando (Cantabria U., Santander) ; Duma, Cristina (INFN, CNAF) ; Ohmann, Christian (ECRIN, Paris) ; Lemrani, Rachid (CC, Villeurbanne) ; Keeble, Oliver (CERN) ; Battaglia, Serena (ECRIN, Paris) ; Poireau, Vincent (Annecy, LAPP) et al.
The eXtreme-DataCloud (XDC) is an EU H2020 funded project aimed at developing scalable technologies for federating storage resources and managing data in highly distributed computing environments. XDC software stack is based on existing tools, whose technical maturity is proved, that the project enriches with new functionalities and plugins to address real life requirements from user communities belonging to a variety of scientific domains: Life Science, Astrophysics, High Energy Physics, Photon Science and Clinical Research. [...]
2018 - 4 p.
- Published in : 10.1109/ROLCG.2018.8572025
In : 11th RO-LCG Conference on Grid, Cloud & High Performance Computing in Science, Cluj-Napoca, Romania, 17 - 19 Oct 2018, pp.8572025
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Observation of Fine Time Structures in the Cosmic Proton and Helium Fluxes with the Alpha Magnetic Spectrometer on the International Space Station
/ Aguilar, M (Madrid, CIEMAT) ; Ali Cavasonza, L (IAS, Julich ; JCHP, Julich) ; Alpat, B (INFN, Perugia) ; Ambrosi, G (INFN, Perugia) ; Arruda, L (LIP, Lisbon) ; Attig, N (IAS, Julich ; JCHP, Julich) ; Aupetit, S (LPSC, Grenoble) ; Azzarello, P (Geneva U.) ; Bachlechner, A (IAS, Julich ; JCHP, Julich) ; Barao, F (LIP, Lisbon) et al.
/AMS
We present the precision measurement from May 2011 to May 2017 (79 Bartels rotations) of the proton fluxes at rigidities from 1 to 60 GV and the helium fluxes from 1.9 to 60 GV based on a total of $1 \times 10^9$ events collected with the Alpha Magnetic Spectrometer aboard the International Space Station. This measurement is in solar cycle 24, which has the solar maximum in April 2014. [...]
2018 - 7 p.
- Published in : Phys. Rev. Lett. 121 (2018) 051101
Fulltext: PDF;
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