Author: Johan BijnensPublisher:
ISBN:
Category :
Languages : de
Pages :
Book Description
Two-pion production in photon photon collisions
Two Pion Production in Photon Photon Collisions
Author: Johan BijnensPion pair production in photon-photon collisions
Author: A. E. BlinovTwo Photon Production of Pion Pairs in E+e− Collisions at 29 GeV
Author: John Henry BoyerEXCLUSIVE production of pion and kaon meson pairs in two photon collisions at LEP
Author: The ALEPH CollaborationPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Pion and Kaon Pair-production in Photon-photon Collisions
Author: Willem G. LangeveldNeutral Pion Production in Nucleus-nucleus Collisions at 158 and 200 GeV/nucleon
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 11
Book Description
Two years ago, at the 12th Winter Workshop on Nuclear Dynamics held here in Snowbird, the authors presented WA80 limits on direct photon production in 200-GeV 32S + Au collisions. It was found that the results were consistent (within 1[sigma]) with the absence of an excess of photons over those that can be accounted for by the two-photon decay branches of [pi]° and [eta] mesons and by the small photon contributions from other radiative decays. They are in the process of finalizing the direct-photon production results from collisions of lead nuclei at 158 GeV/nucleon. The author briefly discusses the status of the analysis and gives some preliminary results at the end of this talk. However, most of this presentation is concerned with a very different aspect of the photon measurements: distributions of neutral pions. In contrast to direct photons which probe initial collision conditions, hadrons, such as neutral pions, interact strongly and decouple late in the reaction evolution and, thus, provide information concerning the system at freeze out. Transverse momentum spectra at low and intermediate p{sub T} relate to thermodynamic and hydrodynamic descriptions of the hot, dense systems. In addition, the high-p{sub T} region reflects the hard-scattering regime and may help one understand initial-state particle production by forming a bridge to proton-proton and proton-nucleus results. It follows that it is essential that the [pi]° measurements cover a large p{sub T} range.
Two Photon Production of Pion Pairs in Ee/sub /minus// Collisions at 29 GeV.
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We present a new measurement of the cross section for the process ee/sup −/ → e+e/sup /minus//?+?/sup /minus// at center-of-mass energy 29 GeV for invariant pion pair masses M/sub /phi//phi// between 350 MeV/c2 and 3.5 GeV/c2. For M/sub /pi//pi// above 2.1 GeV/c2, we find approximate agreement with the hard-scattering prediction of Brodsky and Lepage. In the low mass region, we observe the f2(1270), and measure its radiative width to be 3.15 /plus minus/ .04 /plus minus/ .39 keV. We also observe an enhancement in the /pi//sup +//pi//sup /minus// spectrum near 1 GeV. We hypothesize that it is the f0(975) and determine it's radiative width to be 0.29 /plus minus/ .07 /plus minus/ .12 keV. 48 refs.
Photon-photon Collisions - 9th International Workshop On Photon-photon Collisions
Author: D O CaldwellPublisher: World Scientific
ISBN: 981455460X
Category :
Languages : en
Pages : 532
Book Description
The proceedings blend current and future two-photon physics. Developments since the last Photon-Photon Workshop four years ago are summarized, and the future of the field is projected, not only at existing accelerators, but also at heavy-ion colliders B-factories, and especially linear colliders with back-scattered laser beams.
A Generalized Weizsacker-Williams Method Applied to Pion Production in Proton-Proton Collisions
Author: Publisher:
ISBN:
Category : Particles (Nuclear physics)
Languages : en
Pages : 16
Book Description