Investigation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ρ</mml:mi></mml:math>-meson production in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>π</mml:mi><mml:mi>p</mml:mi></mml:math>interactions at 3.9 GeV /<i>c</i>

Haber, B.; Hodous, M.F.; Hulsizer, R. I.; Kistiakowsky, V.; Levy, A.; Pless, I. A.; Singer, R.; Wolfson, J.; Yamamoto, R. K.

doi:10.1103/physrevd.10.1387

Cited by 12 publications

(5 citation statements)

References 31 publications

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“…Having fixed the parameters we can proceed to our four-body pp → nnπ + π + reaction. [26,27]), π − p → ω 0 n [28], π − p → ρ 0 n [29,30], π + p → ρ + p [27,[30][31][32] and π − p → ρ − p [27,[29][30][31]33] reactions as a function of the incident-beam momenta P lab .…”

Section: Discussionmentioning

confidence: 99%

Exclusivepp→nnπ+π+reaction at LHC and RHIC

Lebiedowicz¹,

Szczurek²

2011

Phys. Rev. D

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We evaluate differential distributions for the four-body pp → nnπ + π + reaction. The amplitude for the process is calculated in the Regge approach including many diagrams. We make predictions for possible future experiments at RHIC and LHC energies. Very large cross sections are found which is partially due to interference of a few mechanisms. Presence of several interfering mechanisms precludes extraction of the elastic π + π + scattering cross section. Absorption effects are estimated. Differential distributions in pseudorapidity, rapidity, invariant two-pion mass, transverse-momentum and energy distributions of neutrons are presented for proton-proton collisions at √ s = 500 GeV (RHIC) and √ s = 0.9, 2.36 and 7 TeV (LHC). Cross sections with experimental cuts are presented.

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Section: Discussionmentioning

confidence: 99%

Exclusivepp→nnπ+π+reaction at LHC and RHIC

Lebiedowicz¹,

Szczurek²

2011

Phys. Rev. D

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“…They allow to study the dynamics of the processes as well as the pion-pion interaction. Up to now a number of experiments which study production of pions by pions were fulfilled on unpolarized proton targets [1][2][3][4][5][6][7] in the intermediate energy region. Their results showed the predominant role of the one pion exchange (OPE) and noticeable effects of absorption.…”

Section: Introductionmentioning

confidence: 99%

“…Spin-dependent SDME integrated over momentum transferred in the region 0.005 < t min − t < 0.2 (GeV/c)2 . .75 −.07 ± .16 −.09 ± .08 .008 ± .025 .007 ± .016 .00 ± .07 −.022 ± .016 .018 ± .025 .025 ± .020 .022 ± .016 .75-.80 −.11 ± .11 −.03 ± .07 −.034 ± .028 .031 ± .011 −.02 ± .06 .000 ± .011 −.017 ± .028 .059 ± .016 .028 ± .011 .80-.90 −.26 ± .18 −.28 ± .13 .00 ± .03 .073 ± .018 −.12 ± .08 .034 ± .013 .04 ± .03 .034 ± .018 .017 ± .013 Table .4 Model-independent analysis.…”

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confidence: 99%

Study of the reaction π−p↑ → π−π+n on a polarized proton target at 17.78 GeV/c. Experiment and amplitude analysis

et al. 1999

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“…GeV (Color on line) The cross section of the reaction p(π − , ρ • )n. The experimental data are from ref [64]…”

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confidence: 99%

Exclusive meson photo- and electro-production, a window on the structure of hadronic matter

Laget

2020

Progress in Particle and Nuclear Physics

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At high energy, exclusive meson photo-and electro-production give access to the structure of hadronic matter. At low momentum transfers, the exchange of a few Regge trajectories leads to a comprehensive account of the cross-sections. Among these trajectories, which are related to the mass spectrum of families of mesons, the Pomeron plays an interesting role as it is related to glue-ball excitations. At high momentum transfers, the exchange of these collective excitations is expected to reduce to the exchange of their simplest (quark or gluon) components. However, contribution from unitarity rescattering cuts are relevant even at high energies. In the JLab energy range, the asymptotic regime, where the players in the game are current quarks and massless gluons has not been reached yet. One has to rely on more effective degrees of freedom adapted to the scale of the probe. A consistent picture, the Partonic Non-Perturbative Regime, is emerging. The properties of its various components (dressed propagators, effective coupling constants, quark wave functions, shape of the Regge trajectories, etc..) provide us with various links to hadron properties. I will review the status of the field, will put in perspective the current achievements at JLab, SLAC and Hermes, and will assess future developments that are made possible by continuous electron beams at higher energies. The p(γ, φ)p reactionThis picture works best when the φ meson is emitted at the most forward angles (that drive the total cross section). At higher −t > 1 GeV 2 , the Pomeron exchange contribution falls down faster than the experimental data as can be seen in Figure 3. The data are better reproduced by modeling [5,6,2] the Pomeron in terms of the exchange of two gluons as depicted in Figure 4. When the two gluons couple to the same constituent quark in the nucleon (bottom part), the interference between their coupling to the same constituent quark or to different quarks in the φ meson induces a node in the cross section. This node disappears when the coupling to different correlated quarks in the nucleon is allowed (top part). The two gluon contribution matches the Pomeron contribution at the lowest −t, but provides more strength at high −t.It turns out that, in the high energy limit, the Pomeron and the two gluon amplitudes have the same functional form and the same structure at low −t. The treatment of the quark loop in the vector meson is the same in the two approaches. The Pomeron Regge pole drives the dynamics of its exchange. Since it is a perturbative-like calculation there is no Regge factor in the two gluon exchange amplitude:

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Investigation ofρ-meson production inπpinteractions at 3.9 GeV /c

Cited by 12 publications

References 31 publications

Exclusivepp→nnπ+π+reaction at LHC and RHIC

Exclusivepp→nnπ+π+reaction at LHC and RHIC

Study of the reaction π−p↑ → π−π+n on a polarized proton target at 17.78 GeV/c. Experiment and amplitude analysis

Exclusive meson photo- and electro-production, a window on the structure of hadronic matter

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