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CERN Document Server 找到 38 笔记录  1 - 10下一个最後  跳到记录: 检索需时 1.41 秒. 
1.
First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–350 GeV / AMS Collaboration
A precision measurement by the Alpha Magnetic Spectrometer on the International Space Station of the positron fraction in primary cosmic rays in the energy range from 0.5 to 350 GeV based on 6.8×106 positron and electron events is presented. The very accurate data show that the positron fraction is steadily increasing from 10 to ∼250  GeV, but, from 20 to 250 GeV, the slope decreases by an order of magnitude. [...]
2013 - 10 p. - Published in : Phys. Rev. Lett. 110 (2013) 141102 External links: Interactions.org article; Symmetry Magazine article; Press Release
2.
The role of the NA62 RICH in the $BR(K^+ \to \pi^+ \nu \bar\nu)$ measurement / Volpe, R (Florence U. ; INFN, Florence ; Louvain U., CP3) ; Anzivino, G (Perugia U. ; INFN, Perugia) ; Aisa, D (Perugia U. ; INFN, Perugia) ; Barbanera, M (INFN, Perugia) ; Bizzarri, M (Perugia U. ; INFN, Perugia) ; Bizzeti, A (Florence U. ; INFN, Florence ; Modena U.) ; Brizioli, F (Perugia U. ; INFN, Perugia) ; Bucci, F (INFN, Florence) ; Campeggi, C (Perugia U. ; INFN, Perugia) ; Carassiti, V (INFN, Ferrara) et al.
The NA62 experiment aims to measure the $BR$($K^+$ $\rightarrow$ $\pi^+$ $v$ $\overline{v}$) with a 10% precision. One of the main backgrounds comes from the decay $K^+$ $\rightarrow$ $\mu^+$ $v$ , therefore a highly powerful pion/muon separation is needed. [...]
Elsevier, 2020 - 4 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 952 (2020) 161802
In : 10th International Workshop on Ring Imaging Cherenkov Detectors, Moscow, Russia, 29 Jul - 4 Aug 2018, pp.161802
3.
Status of the NA62 ring imaging Cherenkov detector / Cenci, P (INFN, Perugia) ; Anzivino, G (Perugia U. ; INFN, Perugia) ; Aisa, D (Perugia U. ; INFN, Perugia) ; Barbanera, M (INFN, Perugia) ; Bizzarri, M (Perugia U. ; INFN, Perugia) ; Bizzeti, A (Modena U. ; INFN, Florence) ; Brizioli, F (Perugia U. ; INFN, Perugia) ; Bucci, F (INFN, Florence) ; Campeggi, C (Perugia U. ; INFN, Perugia) ; Carassiti, V (INFN, Ferrara) et al.
The Ring Imaging Cherenkov detector of the NA62 experiment at the CERN SPS is a key element of particle identification in the NA62 experimental strategy. The detector fulfills different conditions: to distinguish pions from muons with a muon rejection factor of O(10$^2$) in the NA62 momentum range of operation, between 15 and 35 GeV/c; to measure particle arrival time in the decay region with a precision better than 100 ps; to provide fast signals and reference time to the NA62 trigger system. [...]
Elsevier, 2020 - 4 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 952 (2020) 162005
In : 10th International Workshop on Ring Imaging Cherenkov Detectors, Moscow, Russia, 29 Jul - 4 Aug 2018, pp.162005
4.
Commissioning and performance of the NA62 RICH detector / Anzivino, G (Stanford U., Phys. Dept. ; Perugia U. ; INFN, Perugia) ; Aisa, D (Stanford U., Phys. Dept. ; Perugia U. ; INFN, Perugia) ; Barbanera, M (INFN, Perugia) ; Bizzarri, M (Stanford U., Phys. Dept. ; Perugia U. ; INFN, Perugia) ; Bizzeti, A (Modena U. ; INFN, Florence) ; Bucci, F (INFN, Florence) ; Campeggi, C (Stanford U., Phys. Dept. ; Perugia U. ; INFN, Perugia) ; Carassiti, V (INFN, Ferrara) ; Cenci, P (INFN, Perugia) ; Checcucci, B (INFN, Perugia) et al.
NA62 is the last generation kaon experiment at CERN SPS aiming to study the decay K$^+$ $\rightarrow\pi^+ \nu \bar{\nu }$. The goal of the experiment is to measure the decay branching ratio, $O$ (10$^{-10}$) , with 10% precision collecting about 100 K$^+$ $\rightarrow\pi^+ \nu \bar{\nu }$ events in three years of data taking and assuming a 10% signal acceptance. [...]
2017 - 5 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 876 (2017) 84-88
In : 9th International Workshop on Ring Imaging Cherenkov Detectors, Bled, Slovenia, 5 - 9 Sep 2016, pp.84-88
5.
Mirror system of the RICH detector of the NA62 experiment / Aisa, D (Perugia U. ; INFN, Perugia) ; Anzivino, G (Perugia U. ; INFN, Perugia) ; Barbanera, M (Perugia U. ; INFN, Perugia) ; Bizzarri, M (Perugia U. ; INFN, Perugia) ; Bizzeti, A (Modena U. ; INFN, Florence) ; Bucci, F (INFN, Florence) ; Campeggi, C (Perugia U. ; INFN, Perugia) ; Carassiti, V (INFN, Ferrara) ; Cassese, A (Florence U. ; INFN, Florence) ; Cenci, P (INFN, Perugia) et al.
A large RICH detector is used in NA62 to suppress the muon contamination in the charged pion selection by a factor 100 in the momentum range between 15 and 35 GeV/c. The detector consists of a 17 m long tank (vessel), filled with neon gas at atmospheric pressure. [...]
2017 - 23 p. - Published in : JINST 12 (2017) P12017 Fulltext: pdf - PDF; 10.1088_1748-0221_12_12_P12017 - PDF;
6.
Performance of the NA62 RICH detector / Pepe, Monica (INFN, Perugia) ; Aisa, D (INFN, Perugia ; Perugia U.) ; Anzivino, G (INFN, Perugia ; Perugia U.) ; Barbanera, M (INFN, Perugia) ; Bizzarri, M (INFN, Perugia ; Perugia U.) ; Bizzeti, A (Modena U. ; INFN, Florence) ; Bucci, F (INFN, Florence) ; Campeggi, C (INFN, Perugia ; Perugia U.) ; Carassiti, V (INFN, Ferrara) ; Cenci, P (INFN, Perugia) et al.
NA62 is the last generation kaon experiment at CERN SPS aiming to study the decay K+ _ π+νν̅. The goal of the experiment is to measure the decay branching ratio (O(10-10)) with 10% accuracy, collecting about 100 K+ → π+νν̅ events in three years of data taking and assuming a 10% signal acceptance. [...]
2016 - 4 p. - Published in : 10.1109/NSSMIC.2015.7581961
In : 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, San Diego, CA, USA, 31 Oct - 7 Nov 2015, pp.7581961
7.
The beam and detector of the NA62 experiment at CERN / NA62 Collaboration
NA62 is a fixed-target experiment at the CERN SPS dedicated to measurements of rare kaon decays. Such measurements, like the branching fraction of the $K^{+} \rightarrow \pi^{+} \nu \bar\nu$ decay, have the potential to bring significant insights into new physics processes when comparison is made with precise theoretical predictions. [...]
arXiv:1703.08501.- 2017-05-31 - 121 p. - Published in : JINST 12 (2017) P05025 Fulltext: arXiv:1703.08501 - PDF; 10.1088_1748-0221_12_05_P05025 - PDF; IOP OA article: PDF;
8.
Precision Measurement of the Proton Flux in Primary Cosmic Rays from Rigidity 1 GV to 1.8 TV with the Alpha Magnetic Spectrometer on the International Space Station / Aguilar, M (Madrid, CIEMAT) ; Aisa, D (INFN, Perugia ; Perugia U.) ; Alpat, B (INFN, Perugia) ; Alvino, A (INFN, Perugia) ; Ambrosi, G (INFN, Perugia) ; Andeen, K (KIT, Karlsruhe, IKP) ; Arruda, L (LIP, Lisbon) ; Attig, N (IAS, Julich ; JARA, Aachen) ; Azzarello, P (INFN, Perugia ; Geneva U.) ; Bachlechner, A (RWTH Aachen U. ; JARA, Aachen) et al. /AMS
A precise measurement of the proton flux in primary cosmic rays with rigidity (momentum/charge) from 1 GV to 1.8 TV is presented based on 300 million events. Knowledge of the rigidity dependence of the proton flux is important in understanding the origin, acceleration, and propagation of cosmic rays. [...]
2015 - 9 p. - Published in : Phys. Rev. Lett. 114 (2015) 171103 APS Open Access article: PDF; Fulltext: PDF;
9.
Precision Measurement of the Helium Flux in Primary Cosmic Rays of Rigidities 1.9 GV to 3 TV with the Alpha Magnetic Spectrometer on the International Space Station / AMS Collaboration
Knowledge of the precise rigidity dependence of the helium flux is important in understanding the origin, acceleration, and propagation of cosmic rays. A precise measurement of the helium flux in primary cosmic rays with rigidity (momentum/charge) from 1.9 GV to 3 TV based on 50 million events is presented and compared to the proton flux. [...]
2015 - 9 p. - Published in : Phys. Rev. Lett. 115 (2015) 211101 APS Open Access article: PDF;
10.
The RICH detector of the NA62 experiment at CERN / Aisa, D (Perugia U. ; INFN, Perugia) ; Anzivino, G (Perugia U. ; INFN, Perugia) ; Bizzetti, A (Modena U. ; INFN, Florence) ; Bucci, F (INFN, Florence) ; Campeggi, C (Perugia U. ; INFN, Perugia) ; Carassiti, V (INFN, Ferrara) ; Cassese, A (INFN, Florence ; Florence U.) ; Cenci, P (INFN, Perugia) ; Ciaranfi, R (INFN, Florence) ; Duk, V (INFN, Perugia) et al.
The NA62 experiment at CERN aims to measure the branching ratio of the ultra-rare charged kaon decay K+→π+νν¯ with a 10% accuracy and with a background contamination at the 10% level. Since the branching ratio of this decay is O (10 −10 ), to fulfill such request one of the main backgrounds, the decay K+→μ+ν (BR ~63% ), must be suppressed by a rejection factor of 4×10 −13 (assuming 10% signal acceptance). [...]
2014 - 4 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 766 (2014) 1-4 Elsevier Open Access article: PDF;
In : 8th International Workshop on Ring Imaging Cherenkov Detectors, Hayama, Kanagawa, Japan, 2 - 6 Dec 2013, pp.1-4

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