The role of secondary reggeons in central meson production

Kochelev, N.I.; Morii, T.; Reznik, B.L.; Vinnikov, A. V.

doi:10.1007/s100500070094

Cited by 6 publications

(12 citation statements)

References 12 publications

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“…In this case, according to (11), all amplitudes with m 1 , m 2 = 0 are zero, and so |m 1 | = |m 2 | = 1 are the leading terms. According to (13) this corresponds to helicity amplitudes which are proportional to (−t 1 )…”

Section: Exclusive Diffractive Production: General Rulesmentioning

confidence: 97%

“…In this domain the branching ratios of Higgs-like bosons to vector bosons and photon pairs 10 , and the couplings to top quarks, are much suppressed [21], and it becomes problematic to perform a complete coverage of the Higgs boson sector using the conventional inclusive processes. In particular the problem of resolving the signals for different states becomes quite challenging 11 . On the contrary the cross section, σ CEP , for central exclusive diffractive production in the MSSM is enhanced in comparison with that of the SM.…”

Section: Consequences For Signals In the Higgs Sectormentioning

confidence: 99%

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Central exclusive diffractive production as a spin-parity analyser: from hadrons to Higgs

Kaidalov

Хозе

Martin³

et al. 2003

Eur. Phys. J. C

114

170

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We present the general rules for double-Reggeon production of objects with different spins and parities. The existing experimental information on resonance production in these central exclusive diffractive processes is discussed. The absorptive corrections are calculated and found to depend strongly on the quantum numbers of the produced states. The central exclusive diffractive production of 0 + and 0 − Higgs bosons is studied as an illustrative topical example of the use of the general rules. The signal for diffractive 0 + and 0 − Higgs production at the LHC is evaluated using, as an example, the minimal supersymmetric model, with large tan β.

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Section: Exclusive Diffractive Production: General Rulesmentioning

confidence: 97%

Section: Consequences For Signals In the Higgs Sectormentioning

confidence: 99%

Central exclusive diffractive production as a spin-parity analyser: from hadrons to Higgs

Kaidalov

Хозе

Martin³

et al. 2003

Eur. Phys. J. C

114

170

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“…The η ′ -meson being dominantly a (α |ss + β |gg ) state, with presence of a sizeable gluonic component [39], is particularly interesting for our study as here the pomeron-pomeron fusion should be the dominant mechanism in central production. For central production of the η meson the situation may be more complicated and requires consideration of additional f 2IR reggeon exchanges [27,41]. In contrast to η ′ production, no good fit with (tensorial or vectorial) pomeron-pomeron component only is possible for the η meson production.…”

Section: B Pseudoscalar Meson Productionmentioning

confidence: 99%

“…It was argued in Ref. [41] that f 2IR -pomeron and pomeron-f 2IR exchanges could be important for both η and η ′ central production. For comparison, we show the results where f 2IR exchanges are included for η production.…”

Section: B Pseudoscalar Meson Productionmentioning

confidence: 99%

Exclusive central diffractive production of scalar and pseudoscalar mesons; tensorial vs. vectorial pomeron

2014

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We discuss consequences of the models of "tensorial pomeron" and "vectorial pomeron" for exclusive diffractive production of scalar and pseudoscalar mesons in proton-proton collisions. Diffractive production of f 0 (980), f 0 (1370), f 0 (1500), η, and η ′ (958) mesons is discussed. Different pomeronpomeron-meson tensorial coupling structures are possible in general. In most cases two lowest orbital angular momentum -spin couplings are necessary to describe experimental differential distributions. For f 0 (980) and η production reggeon-pomeron, pomeron-reggeon, and reggeon-reggeon exchanges are included in addition, which seems to be necessary at relatively low energies. The theoretical results are compared with the WA102 experimental data. Correlations in azimuthal angle between outgoing protons, distributions in rapidities and transverse momenta of outgoing protons and mesons, in a special "glueball filter variable", as well as some two-dimensional distributions are presented. We discuss differences between results of the vectorial and tensorial pomeron models. We show that high-energy central production, in particular of pseudoscalar mesons, could provide crucial information on the spin structure of the soft pomeron.

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“…However, this subject still remains controversial. Donnachie and Landshoff [4] claimed that perturbative QCD does not work in this energy region and suggested the use of a small admixture of the second "hard" Reggeon exchange whose trajectory is given by α h (t) = 1.418 + 0.1 t. The conventional mesonic trajectories arising from the fits of Donnachie and Landshoff (for instance, f 2 -trajectory [2,8]) contribute to light vector meson productions at relatively low energies. Most of them have a slope of 0.9 GeV −2 and an intercept α(0) ≃ 0.5.…”

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confidence: 99%

On a possible manifestation of f1 trajectory in J/ψ photoproduction

Roy

Morii

Титов³

2001

Physics Letters B

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We analyze a possible manifestation of f 1 -trajectory in elastic J/ψ photoproduction at high energy and large momentum transfer. Inspite of the small contribution of f 1 -trajectory in total cross sections, it becomes significant in various spin observables. In particular, we show that the crucial test for f 1 -exchange can be made by measuring the single beam-and double parity-and beam-target asymmetries at large momentum transfers, where a strong deviation from the exchange of conventional Pomerons is expected. This effect is caused by the interference of natural (Pomeron) and unnatural (f 1 ) parity exchange parts of amplitude in the region where their contributions become comparable to each other and might be interesting to observe in forthcoming experiments, if feasible.PACS numbers: 13.85.Dz 12.40. Nn, 13.85.Lg Typeset using REVT E X * Email address: roy@radix.h.kobe-u.ac.jp † Email address: morii@kobe-u.ac.jp ‡ Email address: atitov@thsun1.jinr.ruHadronic diffraction has regained popularity in the recent years due to many new interesting experiments at HERA and TEVATRON. One of them is the vector meson photoproduction at HERA. This channel is exciting because here one can study any of the known vector mesons from the lightest ρ to heavier J/ψ and Υ and hope to see the transition from the "soft" to the "hard" regime. The most popular models for description of the diffractive processes at high energy are based on the Regge theory [1] where the corresponding multiparticle exchanges with definite quantum numbers are expressed by the effective exchange of one Regge pole whose propagator is given by (s/s 0 ) α(t) . The Regge trajectory α(t) has a simple linear form α(t) = α(0) + α ′ t and the main contribution to the elastic forward photoproduction of light vector mesons comes from the Pomeron (so-called "soft" Pomeron) trajectory with intercept 1.08 and slope of 0.25 GeV −2 [2]. This leads to rather weak energy dependence of the cross section gradually becoming almost constant at very high energies. However, the Pomeron, though amply used to successfully analyze the high energy total hadron cross sections, still remains mysterious in its partonic content, hence its manifestation in QCD also remains unknown.Recent studies of elastic vector meson photoproduction data shows that the J/ψ crosssection shows a steep rise with the energy W [3]. This behavior is quite different from that of other light vector mesons like ρ, ω and φ which are characterized by a weak dependence of their cross section on energy [σ ∝ W 0.22 ], while for J/ψ it is parameterized as W 0.8 . This new phenomenon drew a lot of attention in this field leading to several models being proposed to explain the data [4][5][6][7]. However, this subject still remains controversial. Donnachie and Landshoff [4] claimed that perturbative QCD does not work in this energy region and suggested the use of a small admixture of the second "hard" Reggeon exchange whose trajectory is given by α h (t) = 1.418 + 0.1 t. The conventional mesonic trajector...

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The role of secondary reggeons in central meson production

Abstract: We estimate the contribution of f 2 trajectory exchange to the central η and η ′ production. It is shown that secondary Reggeons may give a large contribution to processes of double diffractive meson production at high energies.PACS number(s): 12.40.Nn, 13.60. Le, 12.39.Mk

Cited by 6 publications

References 12 publications

Central exclusive diffractive production as a spin-parity analyser: from hadrons to Higgs

Central exclusive diffractive production as a spin-parity analyser: from hadrons to Higgs

Exclusive central diffractive production of scalar and pseudoscalar mesons; tensorial vs. vectorial pomeron

On a possible manifestation of f1 trajectory in J/ψ photoproduction

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