137 research outputs found
Form factors of soliton-creating operators in the sine-Gordon model
We propose explicit expressions for the form factors, including their
normalization constants, of topologically charged (or soliton-creating)
operators in the sine-Gordon model. The normalization constants, which
constitute the main content of our proposal, allow one to find exact relations
between the short- and long-distance asymptotics of the correlation functions.
We make predictions concerning asymptotics of fermion correlation functions in
the massive Thirring model, SU(2)-Thirring model with anisotropy, and in the
half-filled Hubbard chain.Comment: 20 pages, 2 figures, harvmac.tex, references adde
High-resolution absorption measurements of NH3 at high temperatures: 2100 - 5500
High-resolution absorption spectra of \NH\ in the region 2100 - 5500 \cm\ at
1027 C and atmospheric pressure (1045 3 mbar) are measured. An
\NH\ concentration of 10\% in volume fraction is used in the measurements.
Spectra are recorded in a high-temperature gas-flow cell using a Fourier
Transform Infrared (FTIR) spectrometer at a nominal resolution of 0.09 \cm. The
spectra are analysed by comparison to a variational line list, BYTe, and
experimental energy levels determined using the MARVEL procedure. 2308 lines
have been assigned to 45 different bands, of which 1755 and 15 have been
assigned or observed for the first time in this work
Expectation values of local fields in Bullough-Dodd model and integrable perturbed conformal field theories
Exact expectation values of the fields e^{a\phi} in the Bullough-Dodd model
are derived by adopting the ``reflection relations'' which involve the
reflection S-matrix of the Liouville theory, as well as special analyticity
assumption. Using this result we propose explicit expressions for expectation
values of all primary operators in the c<1 minimal CFT perturbed by the
operator \Phi_{1,2} or Phi_{2,1}. Some results concerning the
perturbed minimal models are also presented.Comment: 27 pages, harvmac.tex, one epsf figur
ExoMol molecular line lists - XVII The rotation-vibration spectrum of hot SO
Sulphur trioxide (SO) is a trace species in the atmospheres of the Earth
and Venus, as well as well as being an industrial product and an environmental
pollutant. A variational line list for SO, named UYT2, is
presented containing 21 billion vibration-rotation transitions. UYT2 can be
used to model infrared spectra of SO at wavelengths longwards of 2 m
( cm) for temperatures up to 800 K. Infrared absorption
cross sections are also recorded at 300 and 500 C are used to validate the UYT2
line list. The intensities in UYT2 are scaled to match the measured cross
sections. The line list is made available in electronic form as supplementary
data to this article and at \url{www.exomol.com}.Comment: 15 pages, 10 figures, 9 tables MNRAS submitte
- …