共查询到20条相似文献,搜索用时 15 毫秒
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Aaij R Abellan Beteta C Adeva B Adinolfi M Adrover C Affolder A Ajaltouni Z Albrecht J Alessio F Alexander M Alkhazov G Alvarez Cartelle P Alves AA Amato S Amhis Y Anderson J Appleby RB Aquines Gutierrez O Archilli F Arrabito L Artamonov A Artuso M Aslanides E Auriemma G Bachmann S Back JJ Bailey DS Balagura V Baldini W Barlow RJ Barschel C Barsuk S Barter W Bates A Bauer C Bauer T Bay A Bediaga I Belogurov S Belous K Belyaev I Ben-Haim E Benayoun M Bencivenni G Benson S Benton J Bernet R 《Physical review letters》2012,108(11):111602
A search for time-integrated CP violation in D(0)→h(-)h(+) (h=K, π) decays is presented using 0.62 fb(-1) of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D(*+)→D(0)π(+) and D(*-)→D[over ˉ](0)π(-) decay chains. The difference in CP asymmetry between D(0)→K(-)K(+) and D(0)→π(-)π(+), ΔA(CP)≡A(CP)(K(-)K(+))-A(CP)(π(-)π(+)), is measured to be [-0.82±0.21(stat)±0.11(syst)]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations. 相似文献
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F.Fernández 《中国物理C(英文版)》2010,34(9)
We describe the production of (AA) in p(p) collisions using a constituent quark model which has been successfully applied to the N(N)system. 相似文献
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指出将i(h)(б)/(б)t当作为算符来讨论没有多大意义,且i(h)(б)/(б)t≠(H),△t△E≥(h)/2不可能通过i(h)(б)/(б)t或t与(H)2的对易关系得出. 相似文献
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指出将i(h)(б)/(б)t当作为算符来讨论没有多大意义,且i(h)(б)/(б)t≠(H),△t△E≥(h)/2不可能通过i(h)(б)/(б)t或t与(H)2的对易关系得出. 相似文献
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本文从唯象的以Λ-α相互作用位和~(12)C、~(16)O的独立α粒子模型波函数出发,采用折迭位方法,求出了以Λ-~(12)C、Λ-~(16)O等效相互作用位的解析表示,在此基础上计算了超核_Λ~(13)C、_Λ~(17)O的低激发态能量和自旋轨道耦合效应所引起的_Λ~(13)C第一激发态的能级劈裂,并对Λ-~(12)C、Λ-~(16)O等效相互作用位和_Λ~(13)C、_Λ~(17)O的有关问题进行了分析和讨论. 相似文献
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本文用给出_Λ~5He的Λ结合能实验值的Λ-α有效相互作用,统一地用超球谐函数方法的绝热近似,研究了超核_(ΛΛ)~6He的双Λ结合能与_Λ~9Be的Λ结合能.得到的结果比较满意的. 相似文献
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Relativistic mean field theory is tested in reproducing the novel experimentalΛ single particle (π+, K+) spectra of Λ=12/90 hypernuclei (and extended to Λ 209 Pb). The adjusted model is then applied to multistrange systems \({}_{n_\Lambda \Lambda }^{16 + n_\Lambda } O,_{n_\Lambda \Lambda }^{40 + n_\Lambda } Ca\) ; no anomalous behaviour of radii and densities in those multi-Λ hypernuclei is encountered. 相似文献
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M. Jacob 《Zeitschrift fur Physik C Particles and Fields》1988,38(1):273-276
The high relative abundance ofs \(\bar s\) quarks in the quark-gluon plasma will result in peculiar hadronization ratios whereby the Ξ/Λ ratio should be much higher than in usual processes. As a result the Λ( \(\bar \Lambda\) ) should exhibit a sizeable longitudinal polarization due to their importantΞ( \(\bar \Xi\) ) filiation. Discussing such spin effect, the report starts with the determination of theW spin, a recent and successful application of the helicity formalism. 相似文献
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本文将谐振子乘积态为基的方法推广应用于组分集团自旋非零的系统.用此方法和α+p+Λ三集团模型详细研究了Λ6Li超核的基态结构特征.计算结果表明,此方法可以较好地适用于组分集团自旋非零的系统. 相似文献
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用超核的α集团结构和Λ α相互作用唯象位计算了 13ΛC的Λ分离能 ,得到与实验数据符合甚好的结果 ,在此基础上进一步预言了 17ΛO的Λ分离能 ,得到与经验值符合得最佳的结果 ,优于现有国际上的理论计算 相似文献
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本文从ΛΛα三体模型出发,在简谐振子形式下完成了对超核_(ΛΛ)~6He的变分计算。利用形状密度对在各类高斯型相互作用下的_(ΛΛ)~6He的结构和粒子关联进行了详细的研究,得到了内部运动模式。 相似文献
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del Amo Sanchez P Lees JP Poireau V Prencipe E Tisserand V Garra Tico J Grauges E Martinelli M Palano A Pappagallo M Eigen G Stugu B Sun L Battaglia M Brown DN Hooberman B Kerth LT Kolomensky YG Lynch G Osipenkov IL Tanabe T Hawkes CM Watson AT Koch H Schroeder T Asgeirsson DJ Hearty C Mattison TS McKenna JA Khan A Randle-Conde A Blinov VE Buzykaev AR Druzhinin VP Golubev VB Onuchin AP Serednyakov SI Skovpen YI Solodov EP Todyshev KY Yushkov AN Bondioli M Curry S Kirkby D Lankford AJ 《Physical review letters》2010,105(17):172001
We present a search for f(J)(2220) production in radiative J/ψ→γf(J)(2220) decays using 460 fb?1 of data collected with the BABAR detector at the SLAC PEP-II e(+)e? collider. The f(J)(2220) is searched for in the decays to K(+)K? and K(S)?K(S)?. No evidence of this resonance is observed, and 90% confidence level upper limits on the product of the branching fractions for J/ψ→γf(J)(2220) and f(J)(2220)→K(+)K?(K(S)?K(S)?) as a function of spin and helicity are set at the level of 10??, below the central values reported by the Mark III experiment. 相似文献
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3质点在史瓦西场中的自由运动──广义相对论动力学经典理论认为,质点在外力场中自由运动时,其角动量与能量是守恒的,广义相对论也同样承认这两个结论,但要对角动量与能量的形式进行修正.质点在史瓦西场中自由运动时,它始终在过史瓦西场中心的某一平面上,我们取球极坐标的极轴z垂直于质点的运动平面,这样就有θ≡π/2,dθ≡0,这就使涉及到θ的关系式简化了.在经典理论中,质点角动量的形式为mr2。狭义相对论指出,静止质量为m0的质点以速度v运动时,其质量为m0×,广义相对论将质点的角动量的形式修正为m0.质点… 相似文献
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