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1.
L. Berny 《Zeitschrift fur Physik C Particles and Fields》1990,48(2):227-229
Previously published data on low-p T π+/K +/p?p interactions at 250 GeV/c are used to analyze the rapidity charge distribution and hadron structure function for the projectile hadrons. It is shown that the rapidity charge distribution for projectile hadrons can be approximated by a Gauss distribution, and their structure functions are found. 相似文献
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F. Massmann 《The European physical journal. Special topics》2008,154(1):85-88
The paper presents the influence of the laser and
ultrasonic cutter on biological structures and some problems bound up with
the applications of lasers and ultrasounds in surgery. The advantages and
disadvantages of contact and noncontact applications of the Nd:YAG laser
were presented as well as the usefulness of the ultrasonic cutter for
selective cutting of various tissues. The benefits resulting from a combination of the two technologies were discussed, and
initial tests of
the laser-ultrasonic cutter operation were performed, pointing to the
possibility of improving the cutting of biological structures. 相似文献
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Abe K Abt I Ahn CJ Akagi T Allen NJ Ash WW Aston D Baird KG Baltay C Band HR Barakat MB Baranko G Bardon O Barklow T Bazarko AO Ben-David R Benvenuti AC Bilei GM Bisello D Blaylock G Bogart JR Bolton T Bower GR Brau JE Breidenbach M Bugg WM Burke D Burnett TH Burrows PN Busza W Calcaterra A Caldwell DO Calloway D Camanzi B Carpinelli M Cassell R Castaldi R Castro A Cavalli-Sforza M Church E Cohn HO Coller JA Cook V Cotton R Cowan RF Coyne DG D'Oliveira A Damerell CJ Daoudi M De Sangro R 《Physical review letters》1995,75(20):3624-3628
4.
H. H. Hakobyan M. O. Simonyan 《Journal of Contemporary Physics (Armenian Academy of Sciences)》2007,42(5):209-213
Longitudinal profiles of pion and proton showers are measured, up to 20 nuclear interaction lengths at the energies of 20–180 GeV, Measurements have been performed in the iron-scintillation hadron Tile calorimeter of the ATLAS Project on the beams of the Super Proton Synchrotron (SPS) at the European Organization of Nuclear Research (CERN). Comparative analysis of longitudinal profiles of pion and proton showers was made. The experimental data were parameterized and compared with the results of Monte-Carlo simulation. 相似文献
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Acosta D Adelman J Affolder T Akimoto T Albrow MG Ambrose D Amerio S Amidei D Anastassov A Anikeev K Annovi A Antos J Aoki M Apollinari G Arisawa T Arguin JF Artikov A Ashmanskas W Attal A Azfar F Azzi-Bacchetta P Bacchetta N Bachocou H Badgett W Barbaro-Galtieri A Barker GJ Barnes VE Barnett BA Baroiant S Bauer G Bedeschi F Behari S Belforte S Bellettini G Bellinger J Belloni A Ben-Haim E Benjamin D Beretvas A Berry T Bhatti A Binkley M Bisello D Bishai M Blair RE Blocker C Bloom K 《Physical review letters》2006,96(20):202001
We measure the masses of b hadrons in exclusively reconstructed final states containing a J/psi --> mu-mu+ decay using 220 pb(-1) of data collected by the CDF II experiment. We find: m(B+) = 5279.10 +/- 0.41(stat.) +/- 0.36(sys.) MeV/c2, m(B0) = 5279.63 +/- 0.53(stat.) +/- 0.33(sys.) MeV/c2, m(B(s)0) = 5366.01 +/- 0.73(stat.) +/- 0.33(sys.) MeV/c2, m(lambda(b)0) = 5619.7 +/- 1.2(stat.) +/- 1.2(sys.) MeV/c2. m(B+) - m(B0) = -0.53 +/- 0.67(stat.) +/- 0.14(sys.) MeV/c2, m(B(s)0) - m(B0) = 86.38 +/- 0.90(stat.) +/- 0.06(sys.) MeV/c2, m(lambda(b)0) - m(B0) = 339.2 +/- 1.4(stat.) +/- 0.1(sys.) MeV/c2. The measurements of the B(s)0, lambda(b)0 mass, m(B(s)0) - m(B0) and m(lambda(b)0) - m(B0) mass difference are of better precision than the current world averages. 相似文献
7.
F. Gelis A.M. Staśto R. Venugopalan 《The European Physical Journal C - Particles and Fields》2006,48(2):489-500
Limiting fragmentation in proton–proton, deuteron–nucleus and nucleus–nucleus collisions is analyzed in the framework of the Balitsky–Kovchegov equation in high energy QCD. Good agreement with experimental data is obtained for a wide range of energies. Further detailed tests of limiting fragmentation at RHIC and the LHC will provide insight into the evolution equations for high energy QCD. 相似文献
8.
《Nuclear Physics A》2006,764(1-2):52-77
We discuss new physical phenomena expected in particle production in hadron–hadron collisions at high energy, as a consequence of pomeron loop effects in the evolution equations for the color glass condensate. We focus on gluon production in asymmetric, ‘dilute–dense’, collisions: a dilute projectile scatters off a dense hadronic target, whose gluon distribution is highly evolved. This situation is representative for particle production in proton–proton collisions at forward rapidities (say, at LHC) and admits a dipole factorization similar to that of deep inelastic scattering (DIS). We show that at sufficiently large forward rapidities, where the pomeron loop effects become important in the evolution of the target wavefunction, gluon production is dominated by ‘black spots’ (saturated gluon configurations) up to very large values of the transverse momentum, well above the average saturation momentum in the target. In this regime, the produced gluon spectrum exhibits diffusive scaling, so like DIS at sufficiently high energy. 相似文献
9.
Sakumoto WK de Barbaro P Bodek A Budd HS Kim BJ Merritt FS Oreglia MJ Schellman H Schumm BA Bachmann KT Blair RE Foudas C King BJ Lefmann WC Leung WC Mishra SR Oltman E Quintas PZ Rabinowitz SA Sciulli F Seligman WG Shaevitz MH Bernstein RH Borcherding FO Fisk HE Lamm MJ Marsh W Merritt KW Rapidis PA Yovanovitch D Sandler PH Smith WH 《Physical review D: Particles and fields》1992,45(9):3042-3050
10.
P.D. Draggiotis R.H.P. Kleiss C.G. Papadopoulos 《The European Physical Journal C - Particles and Fields》2002,24(3):447-458
The advent of high-energy hadron colliders necessitates efficient and accurate computation of multi-jet production processes,
both as QCD processes in their own right and as backgrounds for other physics. The algorithm that performs these tasks and
a brief numerical study of multi-jet processes are presented.
Received: 21 February 2002 / Published online: 22 May 2002 相似文献
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Kiyoshi Kato Tome Munehisa Hidekazu Tanaka 《Zeitschrift fur Physik C Particles and Fields》1992,54(3):397-410
We develop a next-to-leading-logarithmic parton shower in deep-inelastic scattering. The new model includes all kinds of next-to-leading-logarithmic corrections in the nonsinglet sector. It gives a definite scheme for QCD scale parameter Λ. Also it is possible to analyze final distributions of hadrons for obtaining \(\Lambda _{\overline {{\rm M}S} } \) . In order to include the corrections, we extend the jet calculus to the space-like case. Then we calculate three-body functions for the spacelike decay. In addition to extensive analyses of the scale breaking of the structure function, we study the three-jet fractions using the cluster algorithm and the energy flow distributions. 相似文献
14.
《Physics letters. [Part B]》1999,456(1):5-8
We show that the implementation of chiral symmetry in recent studies of the hadron spectrum in the context of the constituent quark model is inconsistent with chiral perturbation theory. In particular, we show that the leading nonanalytic (LNA) contributions to the hadron masses are incorrect in such approaches. The failure to implement the correct chiral behaviour of QCD results in incorrect systematics for the corrections to the masses. 相似文献
15.
Laser-driven ramp compression was used to investigate iron characteristics along the isentropic path. The iterative Lagrangian analysis method was employed to analyze the free surface velocity profiles in iron stepped target measured with two VISARs. The onset stress for the α to ε phase transformation was determined from the sudden change in the sound velocity and was found over-pressurized compared to the static and shock results. The derived stress(26 GPa) and strain rate(up to 10~8 s~(-1)) are consistent with our previous experimental results. The stress-density relations were compared with those from previous ramp experiments and good agreements were found, which experimentally confirms the simulations,showing that iterative Lagrangian analysis can be applied to the ramp-compression data with weak shock. 相似文献
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Hadron thermodynamics deals with a gas of indistinguishable particles whose mass spectrum is taken to have the formKm
a
e
bm
. A long-standing inconsistency is pointed out, namely the nonextensive nature of the entropy found in some treatments by way of the microcanonical ensemble, which contrasts with the extensive nature found by way of the canonical ensemble. The former result is due to an error. After correction, the two ensembles are found to lead to the same expressions for the thermodynamic quantities ifa –7/2. Some of these expressions are new. Fora<–5/2, the microcanonical approach is used to examine a model in which one particle is appreciably heavier than the rest. However, the resulting entropy is found to be unphysical. 相似文献
19.
Toshihiro Yoshida 《Zeitschrift fur Physik C Particles and Fields》1986,31(3):457-466
A model is formulated for projectile fragmentation in hadron collisions and is used to study the longitudinal-momentum dependence of the single-particle inclusive cross sections. The inclusive cross section consists of two parts due to the initial decay and many-particle production effects, the latter decreasing more rapidly than the former as the longitudinal momentum increases. The variety in the longitudinal-momentum dependence of the cross sections is explained naturally by the different weights of the two effects for the produced particles. 相似文献
20.
Ford WT Qi N Read AL Smith JG Camporesi T De Sangro R Peruzzi I Piccolo M Hurst RB Pyrlik J Venuti JP Weinstein R Gettner MW Goderre GP Sleeman JC von Goeler E Chadwick GB Leedy RE Messner RL Moss LJ Muller F Nelson HN Ritson DM Rosenberg LJ Wiser DE Zdarko RW Groom DE Verdini PG Band HR Delfino MC Johnson JR Lavine TL Maruyama T Prepost R 《Physical review D: Particles and fields》1989,40(5):1385-1396