488 research outputs found
Evidence for maximality of strong interactions from LHC forward data
It is important to check if the Froissaron-Maximal Odderon (FMO) approach is
the only model in agreement with the LHC data. We therefore generalized the FMO
approach by relaxing the constraints both in the even-and
odd-under-crossing amplitude. We show that, in spite of a considerable freedom
of a large class of amplitudes, the best fits bring us back to the maximality
of strong interaction. Moreover, if we leave Odderon Regge pole intercept
completely free we find a very good solution for
near -1 in agreement with the result of oddballs spectroscopy in QCD based on
AdS/CFT correspondence.Comment: Section 5 is extended, one reference is replaced, none of results is
change
Calculation of the real part of the nuclear amplitude at high s and small t from the Coulomb amplitude
A new method for the determination of the real part of the elastic scattering
amplitude is examined for high energy proton-proton at small momentum transfer.
This method allows us to decrease the number of model assumptions, to obtain
the real part in a narrow region of momentum transfer and to test different
models. The possible non-exponential behavior of the real part was found on the
base of the analysis of the ISR experimental data.Comment: 5 pages, 3 figures, Talk on XIth International Conference on Elastic
and Diffractive Scatterin
Discovery of the Odderon by TOTEM experiments and the FMO approach
This paper is an extended version of the talk by B. Nicolescu at the XLVIII
International Symposium on Multiparticle Dynamics (ISMD2018) at Singapore, 3-7
September, 2018. Theoretical basis and history of the Froissaron and Maximal
Odderon (FMO) approach for elastic and scattering is presented.
Precise formulation of the FMO model at any momentum transfer squared is
given. The model is applied to description and analysis of the experimental
data in a wide interval of energy and . The special attention is
given for the latest TOTEM data at 13 TeV, both at and at and
to their interpretation in the FMO model. It is emphasized that the last TOTEM
results can be considered as clear evidence for the first experimental
observation of the Odderon, predicted theoretically about 50 years ago.Comment: LaTeX2e, 10 pages, 5 figures. To be published in Proceedings of
XLVIII International Symposium on Multiparticle Dynamics (ISMD 2018
Interdisciplinary (retail) research: The business of geography and the geography of business
NoAt the 2005 British Academy of Management conference several well-known economic
geographers, including Neil Wrigley, Gordon Clark, and Susan Christopherson, called
for management researchers to engage with economic geographers on interrelated
geographical and managerial issues in the study of (retail) firms. In this commentary
we reflect upon the present geography -management interface.We begin by considering
the term `interdisciplinary research' and its relationship to any management - geography interface. This is followed by a context-specific discussion of international retailing and the role of research on the retail transnational corporation (TNC) in developing an interdisciplinary agenda. This commentary represents an initial more business and management focused response to the call from geography academics for more/better interdisciplinary research at the geography - management interface
New measures of the quality and of the reliability of fits applied to forward hadronic data at t=0
We develop five new statistical measures of the quality of fits, which we
combine with the usual confidence level to determine the models which fit best
all available data for total cross sections and for the real part of the
forward hadronic amplitude.Comment: 7 pages, presented by J.R. Cudell on behalf of the COMPETE
collaboration at the 6th workshop on non-perturbative QCD, American
University of Paris, 5-9 June 200
Analytic parametrizations of the non-perturbative Pomeron and QCD-inspired models
We consider several classes of analytic parametrizations of hadronic
scattering amplitudes, and compare their predictions to all available forward
data (proton- proton, antiproton-proton, pion-proton, kaon-proton,
photon-proton, photon- photon, sigma-proton). Although these parametrizations
are very close for energy larger than 9 GeV, it turns out that they differ
markedly at low energy, where a universal Pomeron term ~(ln s)**2 enables one
to extend the fit down to 4 GeV.Comment: 11 pages, 2 tables, Presented at the 9th Blois Workshop on Elastic
and Diffractive Scattering, Pruhonice, Czech Republic, 9-15 June 200
Analytic Amplitude Models for Forward Scattering
We report on fits of a large class of analytic amplitude models for forward
scattering against the comprehensive data for all available reactions. To
differentiate the goodness of the fits of many possible parametrizations to a
large sample of data, we developed and used a set of quantitative indicators
measuring statistical quality of the fits over and beyond the typical criterion
of the . These indicators favor models with a universal
Pomeron term, which enables one to extend the fit down to GeV.Comment: 13 pages, COMPETE Collaboration, talk presented at the 9th
International Conference (Blois Workshop) on Elastic and Diffractive
Scatterin
Forward observables at RHIC, the Tevatron run II and the LHC
We present predictions on the total cross sections and on the ratio of the
real part to the imaginary part of the elastic amplitude (rho parameter) for
present and future pp and pbar p colliders, and on total cross sections for
gamma p -> hadrons at cosmic-ray energies and for gamma gamma -> hadrons up to
sqrt(s)=1 TeV.
These predictions are based on a study of many possible analytic
parametrisations and invoke the current hadronic dataset at t=0. The
uncertainties on total cross sections, including the systematic theoretical
errors, reach 1% at RHIC, 3% at the Tevatron, and 10% at the LHC, whereas those
on the rho parameter are respectively 10%, 17%, and 26%.Comment: 11 pages, 2 figures, LaTeX, presented at the Second International
"Cetraro" Workshop & NATO Advanced Research Workshop "Diffraction 2002",
Alushta, Crimea, Ukraine, August 31 - September 6, 200
Analytic Amplitudes for Hadronic Forward Scattering : COMPETE Update
We consider several classes of analytic parametrizations of hadronic
scattering amplitudes, and compare their predictions to all available forward
data in hadron-hadron, gamma-p and gamma-gamma reactions. Although these
parametrizations are very close for SQRTs larger than 9 GeV, it turns out that
they differ markedly at low energy, where a universal Pomeron term like ln**2 s
enables one to extend the fit down to SQRTs equal to 4 GeV. We present
predictions on the total cross sections and on the ratio of the real part to
the imaginary part of the elastic amplitude (RHO parameter) for present and
future pp and antipp colliders, and on total cross sections for gamma-p into
hadrons at cosmic-ray energies and for gamma-gamma into hadrons up to SQRTs
equal to 1 TeV.Comment: 3 pages, 3 tables. To be published in the Proceedings of the 31st
International Conference on High Energy Physics (ICHEP 2002), Amsterdam, The
Netherlands, 24-31 July 200
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