Zobrazeno 1 - 10
of 144
pro vyhledávání: '"R. Jengo"'
Publikováno v:
Superstrings, Supergravity and Unified Theories.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::413e1ecd3511e96cde39b1ac9d5f2a99
https://doi.org/10.1142/9789814542395
https://doi.org/10.1142/9789814542395
Autor:
R. Jengo, G. Calucci
Publikováno v:
Lettere al Nuovo Cimento. 4:33-38
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd87f2dbebd97490140622979f5a5b60
https://doi.org/10.1007/bf02807548
https://doi.org/10.1007/bf02807548
Publikováno v:
Nuclear Physics B. 210:142-154
We study the Z(N) spin model, as well as its limiting forms for N → ∞ by means of a variational approach. We find, for 1 + 1 dimensions, the two transitions of the model separating the disordered, massless and ordered phases. In the case of 2 + 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1cb8eecd79349f30abe0761ce88505e4
https://doi.org/10.1016/0550-3213(82)90236-x
https://doi.org/10.1016/0550-3213(82)90236-x
Publikováno v:
Journal of Physics A: Mathematical and General. 12:2037-2051
The recently proposed method for investigating the large-order behaviour of the perturbative expansion is applied to a quantum thermodynamical system of interacting bosons in one space dimension. The method makes essential use of the classical soluti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce7d306fd763eed1f2c9e7e69006170b
https://doi.org/10.1088/0305-4470/12/11/016
https://doi.org/10.1088/0305-4470/12/11/016
Publikováno v:
Physics Letters B. 132:150-154
We evaluate χ ≡ 〈Π i = 1 N f ψ i (r i )) ψ i (r i )〉 where ψi is the i-flavour and ri are different positions on a four dimensional sphere of radius R. Its value comes from the instanton contribution which is finite for finite R. When Nf =
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1dd9b033339e08de4eab686ba15a3e6e
https://doi.org/10.1016/0370-2693(83)90240-x
https://doi.org/10.1016/0370-2693(83)90240-x
Autor:
R. Jengo
Publikováno v:
Nuclear Physics B. 108:447-461
A reggeon field theory for the pomeron is considered in which the pomeron slope α ′ = 0, following two previous papers on the subject. The resulting one-dimensional theory is put in the form of a Schrodinger equation. Here, the particular ordering
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29d743ef62abe4d128970c15cb5a5a00
https://doi.org/10.1016/0550-3213(76)90289-3
https://doi.org/10.1016/0550-3213(76)90289-3
Autor:
Daniele Amati, R. Jengo
Publikováno v:
Physics Letters B. 56:465-469
The Gribov-Reggeon calculus, whose perturbative expansion is expected to converge at low energy, is known to give rise to critical phenomena at ultra-high energies. The aim of this paper is to investigate the transition between these two regimes and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa5a7d512062b18346b33d3880ff46be
https://doi.org/10.1016/0370-2693(75)90413-x
https://doi.org/10.1016/0370-2693(75)90413-x
Publikováno v:
Nuclear Physics B. 197:93-112
A treatment of the interaction between charges and monopoles is presented in terms of functional integration over closed paths. The Lorentz covariance is preserved in all the steps of the procedure and the symmetry between electric charges and magnet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4a02cff51c4adc8a0321ebc816a5544
https://doi.org/10.1016/0550-3213(82)90156-0
https://doi.org/10.1016/0550-3213(82)90156-0
Autor:
R. Jengo, M. Blagojević
Publikováno v:
Physics Letters B. 165:343-346
We show that the quantum field theory of electric and magnetic charges follows a renormalization pattern which closely parallels that of the two-dimensional non-linear sigma model with the Wess-Zumino term.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::579b7a1dba9cff5ec62438b06ab38d8a
https://doi.org/10.1016/0370-2693(85)91242-0
https://doi.org/10.1016/0370-2693(85)91242-0
Autor:
R. Jengo, Néstor Parga
Publikováno v:
Physics Letters B. 134:221-224
In the context of the stochastic quantization we propose factorized approximate solutions for the Fokker-Planck equation for the XY and ZN spin systems in D dimensions. The resulting differential equation for a factor can be solved and it is found to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5166ff23756db65d7928cf29a1c9a700
https://doi.org/10.1016/0370-2693(84)90675-0
https://doi.org/10.1016/0370-2693(84)90675-0