共查询到20条相似文献,搜索用时 156 毫秒
1.
P. V. Chliapnikov L. N. Gerdyukov V. V. Kniazev V. N. Riadovikov A. M. Rybin O. G. Tchikilev V. F. Tchunikhin V. A. Uvarov A. P. Vorobjev M. Barth E. De Wolf M. Gijsen F. Verbeure C. Dujardin F. Grard R. Windmolders CERN-Soviet Union Collaboration 《Zeitschrift fur Physik C Particles and Fields》1980,3(4):285-287
Evidence is provided for a new resonance in theK s 0 K s 0 π+π? system with a mass of 1.97±0.01 GeV and width 40±20 MeV. It is produced with an inclusive cross section of ~6μb in the beam fragmentation process of 4-prongK + p interactions with at least 2 associatedV 0's at 32 GeV/c and decays dominantly into theK * ± (892)K s 0 π? mode. 相似文献
2.
F. Ochiai Y. Yoshimura M. Chikawa N. Fujiwara M. Fukawa H. Kichimi E. Kohriki O. Kusumoto J. MacNaughton K. Miyano S. Noguchi Y. Noguchi T. Okusawa A. Ono T. Sato R. Sugahara A. Suzuki K. Takahashi S. Yamashita 《Zeitschrift fur Physik C Particles and Fields》1984,23(4):369-375
InclusiveK s 0 andK s 0 K s 0 production in \(\bar pp\) interactions at 3.0, 3.5, 4.0 and 4.5 GeV/c are studied. Cross sections ofK s 0 , K s 0 K s 0 andK *±(892) are presented for each incident momentum. The production ofK s 0 andK *±(892) through annihilation process is investigated. It is found that the annihilation process is dominant but decreases with incident momentum. The annihilation process is compared withe + e ? interactions. Remarkable similarity between them is found in the \({{x_0 = 2E(K_s^0 )} \mathord{\left/ {\vphantom {{x_0 = 2E(K_s^0 )} {\sqrt s }}} \right. \kern-0em} {\sqrt s }}\) distribution. Events with two detectedK s 0 's are analyzed. The result shows theK s 0 K s 0 pairs are produced in the central region of c.m. system and there is a clearS * signal in theK s 0 K s 0 effective mass distribution. 相似文献
3.
J. Hladký M. Novák A. Prokeš J. Votruba V. I. Genchev V. D. Kekelidze V. G. Krivokhizhin V. V. Kukhtin M. F. Likhachev I. Manno I. A. Savin L. V. Silvestrov G. Vesztergombi K. -F. Albrecht A. Meyer H. -E. Ryseck M. Sachwitz F. Deak 《Czechoslovak Journal of Physics》1976,26(11):1290-1293
New experimental results on the coherentK
L
0
C K
S
0
C regeneration in the momentum range 10p30 GeV/c are presented. For the quantity (f
0–¯f
0/k (where f0 and¯f
0 are theKC and¯K
0C forward scattering amplitudes andk is the wave number) we have obtained: arg (f
0–¯f
0)/k=–126±14 and ¦(f
0–¯f
0/k¦ p
–0.62±0.14 These results are well described by a simple Regge pole model including only the (-trajectory exchange in thet-channel with the intercept (0) close to 0.4.Presented at the IV International Symposium on High Energy and Elementary Particle Physics, Warszaw, September 1975. 相似文献
4.
We have studied \(D_s^ + \to K_0^{* + } \bar K^0\) and \(D_s^ + \to \bar K_0^{*0} K^ +\) decays in the factorization of the hadron currents approximation. The spectator model leads the decays have different but negligible branching ratios. We show, however, that the inclusion of annihilation contribution can enhance the branching ratios. We predict that \(B(D_s^ + \to \bar K_0^{*0} K^ + )\) and \(B(D_s^ + \to K_0^{* + } \bar K^0 )\) could be around 2%. 相似文献
5.
Physics of Atomic Nuclei - 相似文献
6.
在对Gruneisen系数高温高压下演化特性不作任何假设的前提下,建立了一种不依赖于等温物态方程具体形式,通过Hugoniot实验数据直接确定0 K零压等温体积模量B0K及其对压力的一阶导数B'0K和初始密度ρ0K等0 K物态方程输入参数的方法.通过与实验和理论数据的分析和比较,表明用这一方法确定的B0K和B'0K不仅合理,而且具有很高的精度,特别是B'0K的精度,要优于目前传统超声实验的测量精度.此外,这一方法所确定的ρ0K不仅在Gruneisen物态方程的框架内与相应的室温零压特性参数相适配,而且与低温热膨胀实验数据所确定的近0 K初始密度ρ0E非常吻合. 相似文献
7.
8.
在对Grtineisen系数高温高压下演化特性不作任何假设的前提下,建立了一种不依赖于等温物态方程具体形式,通过Hugoniot实验数据直接确定0K零压等温体积模量B0K及其对压力的一阶导数B′0k。和初始密度ρ0K等0K物态方程输入参数的方法。通过与实验和理论数据的分析和比较,表明用这一方法确定的.B0K和B′0k不仅合理,而且具有很高的精度,特别是B′0k的精度,要优于目前传统超声实验的测量精度。此外,这一方法所确定的ρ0K不仅在Grtineisen物态方程的框架内与相应的室温零压特性参数相适配,而且与低温热膨胀实验数据所确定的近0K初始密度ρ0E非常吻合。 相似文献
9.
Contrary to previous simulation results on the existence of amorphous intergranular films at high-angle twist grain boundaries (GBs) in elemental solids such as silicon, recent experimental results imply structural order in some high-angle boundaries. With a novel protocol for simulating twist GBs, which allows the number of atoms at the boundary to vary, we have found new low-energy ordered structures. We give a detailed exposition of the results for the simplest boundary. The validity of our results is confirmed by first-principles calculations. 相似文献
10.
G. A. Akopdzhanov V. B. Anikeev V. A. Bezzubov I. A. Vasilyev Yu. V. Gilitsky S. N. Gurzhiev S. P. Denisov A. A. Durum S. A. Zvyagintsev A. V. Kozelov E. A. Kozlovsky V. M. Korablev V. I. Koreshev V. I. Kurbakov V. V. Lipaev V. A. Onuchin A. M. Rybin Yu. M. Sapunov M. M. Soldatov D. A. Stoyanova K. I. Trushin A. A. Schukin V. I. Yakimchuk 《Physics of Atomic Nuclei》2008,71(12):2074-2086
K ± → e ± νπ 0 decays have been studied using the KMN setup at the Institute for High Energy Physics (Protvino). The experiment has been performed in the 36-GeV/c hadron beams of the IHEP accelerator. The accumulated data allow us to select ~1.08M candidates for K e3 decays. Analyzing the Dalitz plot of these events, we estimate the linear slope of the charge form factor to be λ + = [30.44 ± 0.83(stat.) ± 0.74(syst.)] × 10?3. 相似文献
11.
12.
《Physics letters. [Part B]》1999,441(2-3):332-338
13.
《Zeitschrift fur Physik C Particles and Fields》1997,76(2):213-221
Inclusive K 0 and Λ photoproduction has been investigated at HERA with the H1 detector at an average photon-proton center of mass energy of 200 GeV in the transverse momentum range 0.5 < p t < 5 GeV. The production rates as a function of p t and center of mass rapidity are compared to those obtained in deep inelastic scattering at 〈Q 2〉 = 23 GeV2. A similar comparison is made of the rapidity spectra of charged particles. The rate of strangeness photoproduction is compared with $p\bar p$ measurements. The observations are also compared with next-to-leading order QCD calculations and the predictions of a Monte Carlo model. 相似文献
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15.
T. A. Armstrong M. Benayoun W. Beusch I. J. Bloodworth J. N. Carney R. Childs B. R. French B. Ghidini A. Jacholkowski J. Kahane J. B. Kinson A. Kirk K. Knudson V. Lenti Ph. Leruste A. Malamant J. L. Narjoux F. Navach A. Palano E. Quercigh N. Redaelli L. Rossi M. Sené R. Sené M. Stassinaki M. T. Trainor G. Vassiliadis O. Villalobos Baillie M. F. Votruba G. Zito R. Zitoun WA Collaboration 《Zeitschrift fur Physik C Particles and Fields》1990,46(3):405-410
The reactionpp→p f (K + K -π+π-)p s , where theK + K ? π+π- system is centrally produced, has been studied at 300 GeV/c. TheK *0 \(K^{*0} \bar K^{*0} \) final state has been observed and the cross sections for its central production are found to be the same at 300 and 85 GeV/c. TheK *0 \(K^{*0} \bar K^{*0} \) final state appears to be produced as a non-resonant threshold enhancement. 相似文献
16.
《Physics letters. [Part B]》1997,415(3):280-288
17.
《Physics letters. A》2006,357(1):6-11
We find the time evolution of the system of two non-interacting unstable particles, distinguishable as well as identical ones, in arbitrary reference frame having only the Kraus operators governing the evolution of its components in the rest frame. We than calculate in the rigorous way Einstein–Podolsky–Rosen quantum correlation functions for system in the singlet state taking into account CP-violation and decoherence and show that the results are exactly the same despite the fact we treat kaons as distinguishable or identical particles which means that the statistics of the particles plays no role, at least in considered cases. 相似文献
18.
负绝对温度状态与正绝对温度状态一样客观存在并且同样具有实际意义.本文从S—U关系及其图形出发研究了金属自由电子在T=一OK及T<OK状态下的分布情况且跟T=+OK及T>OK时的自由电子分布进行了类比,继而给出了微观解释. 相似文献
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20.
J. Hladký S. NĚmeček M. Novák A. Prokeš J. Votruba K. -F. Albrecht A. Meyer M. Sachwitz B. N. Guskov V. G. Krivokhizhin M. F. Likhachev I. A. Savin G. Vesztergombi 《Czechoslovak Journal of Physics》1977,27(11):1210-1218
Results of the first elastic K
S
o
regeneration experiment on carbon, using magnetic spark chamber spectrometer, are presented in the beam momentum interval 10p50 GeV/c. The d ifferentia cross section d/dt is reconstructed in the range 0·0025–t0·02 (GeV/c)2 and its slopeB is found to be momentum independent with an average valueB=(65±11) (GeV/c)–2. The results are in agreement with the calculations using the coherent production model. 相似文献