排序方式: 共有21条查询结果,搜索用时 15 毫秒
1.
Kantsyrev A. V. Panyushkin V. A. Balanutsa P. V. Bogdanov A. V. Gerasimov A. S. Golubev A. A. Demekhin V. I. Dolgolenko A. G. Kristi N. M. Ladygina E. M. Lushchevskaya E. V. Fedorets P. V. Chernetsky V. D. Paniushkina A. N. Vasiliev V. V. Büscher M. 《Physics of Atomic Nuclei》2019,82(12):1665-1671
Physics of Atomic Nuclei - In the PANDA experiment of the FAIR project, it is proposed to use internal targets based on the hydrogen isotopes that provide a monodisperse regime of flow generation... 相似文献
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Mattson M Alkhazov G Atamantchouk AG Balatz MY Bondar NF Cooper PS Dauwe LJ Davidenko GV Dersch U Dolgolenko AG Dzyubenko GB Edelstein R Emediato L Endler AM Engelfried J Eschrich I Escobar CO Evdokimov AV Filimonov IS Garcia FG Gaspero M Giller I Golovtsov VL Gouffon P Gülmez E Kangling H Iori M Jun SY Kaya M Kilmer J Kim VT Kochenda LM Konorov I Kozhevnikov AP Krivshich AG Krüger H Kubantsev MA Kubarovsky VP Kulyavtsev AI Kuropatkin NP Kurshetsov VF Kushnirenko A Kwan S Lach J Lamberto A 《Physical review letters》2002,89(11):112001
We observe a signal for the doubly charmed baryon Xi(+)(cc) in the charged decay mode Xi(+)(cc)-->Lambda(+)(c)K-pi(+) in data from SELEX, the charm hadroproduction experiment at Fermilab. We observe an excess of 15.9 events over an expected background of 6.1+/-0.5 events, a statistical significance of 6.3sigma. The observed mass of this state is 3519+/-1 MeV/c(2). The Gaussian mass width of this state is 3 MeV/c(2), consistent with resolution; its lifetime is less than 33 fs at 90% confidence. 相似文献
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V. V. Barmin A. E. Asratyan V. S. Borisov C. Curceanu G. V. Davidenko A. G. Dolgolenko C. Guaraldo M. A. Kubantsev I. F. Larin V. A. Matveev V. A. Shebanov N. N. Shishov L. I. Sokolov G. K. Tumanov V. S. Verebryusov 《Physics of Atomic Nuclei》2010,73(7):1168-1175
The data on the charge-exchange reaction K +Xe → K 0 pXe′, obtained with the bubble chamber DIANA, are reanalyzed using increased statistics and updated selections. Our previous evidence for formation of a narrow pK 0 resonance with mass near 1538 MeV is confirmed. The statistical significance of the signal reaches some 8 (6) standard deviations when estimated as $ {S \mathord{\left/ {\vphantom {S {\sqrt B \left( {{S \mathord{\left/ {\vphantom {S {\sqrt {B + S} }}} \right. \kern-0em} {\sqrt {B + S} }}} \right)}}} \right. \kern-0em} {\sqrt B \left( {{S \mathord{\left/ {\vphantom {S {\sqrt {B + S} }}} \right. \kern-0em} {\sqrt {B + S} }}} \right)}} $ . The mass and intrinsic width of the Θ+ baryon are measured as m = 1538 ± 2 MeV and Γ = 0.39 ± 0.10 MeV. 相似文献
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Ackerman N Aharmim B Auger M Auty DJ Barbeau PS Barry K Bartoszek L Beauchamp E Belov V Benitez-Medina C Breidenbach M Burenkov A Cleveland B Conley R Conti E Cook J Cook S Coppens A Counts I Craddock W Daniels T Danilov MV Davis CG Davis J deVoe R Djurcic Z Dobi A Dolgolenko AG Dolinski MJ Donato K Dunford M Fairbank W Farine J Fierlinger P Franco D Freytag D Giroux G Gornea R Graham K Gratta G Green MP Hägemann C Hall C Hall K Haller G Hargrove C Herbst R Herrin S Hodgson J Hughes M Johnson A 《Physical review letters》2011,107(21):212501
We report the observation of two-neutrino double-beta decay in (136)Xe with T(1/2) = 2.11 ± 0.04(stat) ± 0.21(syst) × 10(21) yr. This second-order process, predicted by the standard model, has been observed for several nuclei but not for (136)Xe. The observed decay rate provides new input to matrix element calculations and to the search for the more interesting neutrinoless double-beta decay, the most sensitive probe for the existence of Majorana particles and the measurement of the neutrino mass scale. 相似文献
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V. V. Barmin V. S. Borisov G. V. Davidenko A. G. Dolgolenko C. Guaraldo I. F. Larin V. A. Matveev C. Petrascu V. A. Shebanov N. N. Shishov L. I. Sokolov G. K. Tumanov 《Physics of Atomic Nuclei》2003,66(9):1715-1718
The status of our investigation of low-energy K +Xe collisions in the xenon bubble chamber DIANA is reported. In the charge-exchange reaction K +Xe → K 0 pXe′, the spectrum of K 0 p effective mass shows a resonant enhancement with M=1539±2 MeV/c 2 and Γ≤9 MeV/c 2. The statistical significance of the enhancement is near 4.4σ. The mass and width of the observed resonance are consistent with expectations for the lightest member of the antidecuplet of exotic pentaquark baryons, as predicted in the framework of the chiral soliton model. 相似文献
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M Auger DJ Auty PS Barbeau E Beauchamp V Belov C Benitez-Medina M Breidenbach T Brunner A Burenkov B Cleveland S Cook T Daniels M Danilov CG Davis S Delaquis R Devoe A Dobi MJ Dolinski A Dolgolenko M Dunford W Fairbank J Farine W Feldmeier P Fierlinger D Franco G Giroux R Gornea K Graham G Gratta C Hall K Hall C Hargrove S Herrin M Hughes A Johnson TN Johnson A Karelin LJ Kaufman A Kuchenkov KS Kumar DS Leonard F Leonard D Mackay R Maclellan M Marino B Mong M Montero Díez AR Müller R Neilson 《Physical review letters》2012,109(3):032505
We report on a search for neutrinoless double-beta decay of ^{136}Xe with EXO-200. No signal is observed for an exposure of 32.5?kg?yr, with a background of ~1.5×10^{-3} kg^{-1}?yr^{-1}?keV^{-1} in the ±1σ region of interest. This sets a lower limit on the half-life of the neutrinoless double-beta decay T_{1/2}^{0νββ}(^{136}Xe)>1.6×10^{25} yr (90% C.L.), corresponding to effective Majorana masses of less than 140-380?meV, depending on the matrix element calculation. 相似文献
8.
Abov Yu. G. Boreskov K. G. Vysotsky M. I. Danilov M. V. Dolgolenko A. G. Dremin I. M. Zakharov V. I. Ioffe B. L. Kancheli O. V. Karnakov B. M. Lipatov L. N. Matveev V. A. Novikov V. A. Okun L. B. Saperstein E. E. Simonov Yu. A. Skrinsky A. N. Tyurin N. E. Shevchenko V. I. 《Physics of Atomic Nuclei》2010,73(11):1979-1980
Physics of Atomic Nuclei - 相似文献
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Larin I McNulty D Clinton E Ambrozewicz P Lawrence D Nakagawa I Prok Y Teymurazyan A Ahmidouch A Asratyan A Baker K Benton L Bernstein AM Burkert V Cole P Collins P Dale D Danagoulian S Davidenko G Demirchyan R Deur A Dolgolenko A Dzyubenko G Ent R Evdokimov A Feng J Gabrielyan M Gan L Gasparian A Gevorkyan S Glamazdin A Goryachev V Gyurjyan V Hardy K He J Ito M Jiang L Kashy D Khandaker M Kingsberry P Kolarkar A Konchatnyi M Korchin A Korsch W Kowalski S Kubantsev M Kubarovsky V Li X Martel P 《Physical review letters》2011,106(16):162303
High precision measurements of the differential cross sections for π0 photoproduction at forward angles for two nuclei, 12C and 208Pb, have been performed for incident photon energies of 4.9-5.5 GeV to extract the π0→γγ decay width. The experiment was done at Jefferson Lab using the Hall B photon tagger and a high-resolution multichannel calorimeter. The π0→γγ decay width was extracted by fitting the measured cross sections using recently updated theoretical models for the process. The resulting value for the decay width is Γ(π0→γγ)=7.82±0.14(stat)±0.17(syst) eV. With the 2.8% total uncertainty, this result is a factor of 2.5 more precise than the current Particle Data Group average of this fundamental quantity, and it is consistent with current theoretical predictions. 相似文献