排序方式: 共有14条查询结果,搜索用时 31 毫秒
1.
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
2.
P. Darriulat P. Dittmann K. Eggert M. Holder K.T. McDonald T. Modis F.L. Navarria A. Seiden J. Strauss G. Vesztergombi E.G.H. Williams 《Nuclear Physics B》1976,107(3):429-456
We present a study of the final state structure in proton-proton collisions (√s = 53 GeV) where a large transverse momentum π0 (pt > 2 GeV/c) is produced at an angle of 90°. Charged secondaries have been detected and momentum analysed in the split field magnet detector at the CERN Intersecting Storage Rings. The large angular coverage of this detector extends over ±2.5 units of rapidity and ±30° of azimuth with respect to the trigger π0, both towards and away from it. In each of these directions, where we observe similar strong correlations, we present charged particle distributions, in rapidity and momentum. In the hemisphere containing the trigger π0 we have measured the cross section for inclusive production of large transverse momentum ?± mesons. In the opposite hemisphere the data exhibit several features predicted by hard scattering quark-parton models: coplanarity and short-range rapidity correlation for the large transverse momentum secondaries as well as a transverse momentum sharing distribution similar to that observed in deep inelastic electro-production and in e+e? collisions. 相似文献
3.
Katalin Vesztergombi 《Discrete Mathematics》1996,150(1-3):379-386
We determine all homogenous linear inequalities satisfied by the numbers of occurrences of the two largest distances among n points in the plane. 相似文献
4.
R. Kopp A. Argento A. C. Benvenuti D. Bollini G. Bruni T. Camporesi M. Cribier J. Cvach N. G. Fadeev J. Feltesse I. A. Golutvin M. Goossens G. Heiman D. Jamnik Y. T. Kiryushin V. S. Kisselev M. Klein V. G. Krivokhizhin V. V. Kukhtin W. Lohmann U. Meyer-Berkhout A. Milsztajn L. Monari F. L. Navarria W. D. Nowak A. Ouraou L. Piemontese P. Rich-Hennion Y. Sacquin I. A. Savin G. Smadja G. I. Smirnov A. Staude K. M. Teichert R. Tirler G. Todorova P. Todorov P. Verrecchia G. Vesztergombi M. Virchaux A. G. Volodko R. Voss J. Zacek Č. Zupančič BCDMS Collaboration 《Zeitschrift fur Physik C Particles and Fields》1985,28(2):171-174
5.
T. Anticic B. Baatar J. Bartke L. Betev H. Bia?kowska B. Boimska J. Bracinik V. Cerny O. Chvala J. Dolejsi V. Eckardt H. G. Fischer Z. Fodor E. G?adysz K. Kadija A. Karev V. Kolesnikov M. Kowalski M. Kreps M. Makariev A. Malakhov M. Mateev G. Melkumov A. Rybicki N. Schmitz P. Seyboth T. Susa P. Szymanski V. Trubnikov D. Varga G. Vesztergombi S. Wenig 《The European Physical Journal C - Particles and Fields》2010,68(1-2):1-73
New data on the production of charged kaons in p+p interactions are presented. The data come from a sample of 4.8 million inelastic events obtained with the NA49 detector at the CERN SPS at 158 GeV/c beam momentum. The kaons are identified by energy loss in a large TPC tracking system. Inclusive invariant cross sections are obtained in intervals from 0 to 1.7 GeV/c in transverse momentum and from 0 to 0.5 in Feynman x. Using these data as a reference, a new evaluation of the energy dependence of kaon production, including neutral kaons, is conducted over a range from 3 GeV to $\mathrm{p}+\overline{\mathrm{p}}$ collider energies. 相似文献
6.
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
7.
Bächler J Bartke J Bialkowska H Bock R Brockmann R Buncic P Chase SI Derado I Eckardt V Eschke J Ferenc D Fleischmann B Foka P Fuchs M Gazdzicki M Gladysz E Harris JW Heck W Hoffmann M Jacobs PM Kabana S Kadija K Keidel R Kosiec J Kowalski M Kühmichel A Lahanas M Lee JY Ljubicic A Margetis S Morse R Nappi E Odyniec G Paic G Panagiotu AD Petridis A Piper A Posa F Poskanzer AM Pugh HG Pühlhofer F Rai G Rauch W Renfordt R Röhrich D Roland G Rothard H Runge K Sandoval A Schambach JJ Schmitz N 《Physical review letters》1994,72(10):1419-1422
8.
K. Eggert W. Thomé K.L. Giboni B. Betev P. Darriulat P. Dittmann M. Holder J. Kaltwasser K.T. McDonald H.G. Pugh G. Vesztergombi T. Modis K. Tittel P. Allen I. Derado V. Eckardt H.J. Gebauer R. Meinke S. Uhlig 《Nuclear Physics B》1975,98(1):73-92
In an experiment at the CERN ISR, a streamer chamber detector surrounding one of the intersection regions was triggered on large transverse momentum π0's by means of an array of lead-glass counters. The directions of charged particles and γ rays converted in lead-oxide plates inside the streamer chamber were measured. Data were taken at c.m. energy of √s = 53 GeV at two production angles of the high pTπ0 (90° and 53°). They indicate an enhancement of particles mostly in the hemisphere opposite to the π0. In the 53° data, a shift of this enhancement towards rapidities opposite to the rapidity of the π0 and confined to a ±30° azimuthal region around the collision plane is observed. In addition, a short-range angular correlation is evidenced between the high pTπ0 and the other collisions products (photons or charged particles). Two-particle correlations between charged particles produced in association with the high pTπ0 are found similar to those 相似文献
9.
A.C. Benvenuti D. Bollini G. Bruni T. Camporesi G. Heiman L. Monari F.L. Navarria A. Argento M. Bozzo H. Gennow M. Goosens W.-D. Nowak L. Piemontese G. Vesztergombi R. Voss S.P. Baranov D.Yu. Bardin N.G. Fadeev M. Virchaux 《Physics letters. [Part B]》1985,158(6):531-535
In deep inelastic interactions of 200 GeV muons with a carbon target, we have found 17 events of the type μ±N→μ±μ?μ?X (“wrong-sign” dimuons). We derive upper limits of 1.2% (90% CL) on transitions (mixing) or, alternatively, of 9 pb (90% CL) cross section for pair production as possible sources of such events. 相似文献
10.
K. Eggert K.L. Giboni W. Thomé B. Betev P. Darriulat P. Dittmann M. Holder K.T. McDonald H.G. Pugh G. Vesztergombi T. Modis K. Tittel V. Eckardt H.J. Gebauer R. Meinke O.R. Sander P. Seyboth 《Nuclear Physics B》1975,98(1):49-72
We present a study of the transverse momentum spectrum of π0's produced at c.m. angles θ = 90° and 53° in pp collisions at √s = 23.6, 30.8, 45.1, 53.2, and 62.9 GeV. The experiment was performed with a lead-glass detector. The data can be described with the usual parametrization , with n = 7.2 ± 0.2. Comparison between the 90° and 53° data further indicates no appreciable dependence on θ, at least for xT < 0.3. Two-particle inclusive cross sections for π0's produced alongside are also presented. They are observed to have a dependence upon the transverse momentum of the dipion similar to that of single-particle cross sections and with the same value of n. Two-photon decays of η mesons are observed between 3 and 4 GeV/c transverse momentum with a production cross section half of that of π0. 相似文献