1,116,859 research outputs found
Entropy, Thermostats and Chaotic Hypothesis
The chaotic hypothesis is proposed as a basis for a general theory of
nonequilibrium stationary states.
Version 2: new comments added after presenting this talk at the Meeting
mentioned in the Acknowledgement. One typo corrected.Comment: 6 page
Wideband wattmeter for instant measurement of real power
Portable, solid state wattmeter with wideband (dc to 1 MHz) linear multiplier which provides true four quadrant operation permitting instantaneous indication of real power as oscilloscope display is described
Strong IR Cancellation in Heavy Quarkonium and Precise Top Mass Determination
Combining recent perturbative analyses on the static QCD potential and the
quark pole mass, we find that, for the heavy quarkonium states ,
and , (1) ultra-soft (US) corrections in the binding
energies are small, and (2) there is a stronger cancellation of IR
contributions than what has been predicted by renormalon dominance hypothesis.
By contrast, for a hypothetical heavy quarkonium system with a small number of
active quark flavors (), we observe evidence that renormalon
dominance holds accurately and that non-negligible contributions from US
corrections exist. In addition, we examine contributions of renormalons at . As an important consequence, we improve on a previous prediction for
possible achievable accuracy of top quark --mass measurement
at a future linear collider and estimate that in principle 20--30~MeV accuracy
is reachable.Comment: 17 pages, 7 figures, 3 tables; Revisions in ver.2: We added (i) a
more conservative error estimate of m_t determination, (ii) discussion on
u=+1 and u=-1 renormalons, (iii) interpretation of PS-schem
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