62 research outputs found
On Rationality
Rationality is an enduring topic of interest across the disciplines and has become even more so, given the current crises that are unfolding in our society. The four books reviewed here, which are written by academics working in economics, political science, political theory and philosophy, provide an interdisciplinary engagement with the idea of rationality and the way it has shaped the institutional frameworks and global political economy of our time. Rational choice theory has certainly proved to be a useful analytic tool in certain contexts, and instrumental reason has been a key tenet of human progress in several periods of history, including the industrial revolution and the modernity that emerged in the nineteenth century. Given the complexity of our current challenges, however, is it time to ask whether this paradigm might be better complemented by more holistic and heterodox approaches? Hindmoor A and Taylor TY (2015) Rational Choice (Political Analysis), 2nd edn. London; New York: Palgrave Macmillan. Massumi (2015) The Power at the End of the Economy. Durham: Duke University Press. Brown (2015) Undoing the Demos: Neoliberalism’s Stealth Revolution. New York: Zone Books. Ludovisi SG (ed.) (2015) Critical Theory and the Challenge of Praxis: Beyond Reification. Farnham; Burlington, VT: Ashgate
Study of tau Decays to Four-Hadron Final States with Kaons
The tau decays to four hadrons have been studied with the CLEO III detector
at the Cornell Electron Storage Ring (CESR) using (7.56 +- 0.15) fb^{-1} of
data collected near the Y(4S) resonance. We present the first statistically
significant measurements of B(tau- -> K- pi+pi- pi0 nu, excluding K^0) = (7.4
+- 0.8 +- 1.1) x 10^{-4} and B(tau--> K- K+ pi- pi0 nu) = (5.5 +- 1.4 +- 1.2) x
10^{-5}, including the first observation of the decay, tau- -> K- omega nu,
with branching fraction (4.1 +- 0.6 +- 0.7) x 10^{-4}. We also publish the
first upper limit for B(tau- -> K- K+ K- pi0 nu) < 4.8 (6.1) x 10^{-6} at 90%
(95%) confidence level (C.L.).Comment: 9 pages postscript, also available from
http://www.lns.cornell.edu/public/CLNS/2004/, submitted to PR
Search for X(3872) in gamma gamma Fusion and ISR at CLEO
We report on a search for the recently reported X(3872) state using 15.1
fb^{-1} e+ e- data taken in the \sqrt{s} = 9.46-11.30 GeV region. Separate
searches for the production of X(3872) in untagged gamma-gamma fusion and e+ e-
annihilation following initial state radiation (ISR) are made by taking
advantage of the unique correlation of J/psi -> l+ l- in X(3872) decay to pi+
pi- J/psi. No signals are observed in either case, and 90% confidence upper
limits are established as (2J+1)\Gamma_{\gamma\gamma}B(X -> pi+ pi- J/psi) <
12.9 eV and \Gamma_{ee}B(X -> pi+ pi- J/psi) < 8.3 eV.Comment: 8 pages postscript,also available through
http://www.lns.cornell.edu/public/CLNS/2004/, submitted to PR
The Search for eta(1440) --> K^0_S K^pm \pi^mp in Two-Photon Fusion at CLEO
We analyze 13.8 \rm fb^{-1} of the integrated e^+e^- luminosity collected at
10.6 GeV center-of-mass energy with the CLEO II and CLEO II.V detectors to
study exclusive two-photon production of hadrons with masses below 1.7{\rm \
GeV/c^2} decaying into the K^0_S K^\pm \pi^\mp final state. We observe two
statistically significant enhancements in the \eta(1440) mass region. These
enhancements have large transverse momentum which rules them out as being due
to pseudoscalar resonances but is consistent with the production of
axial-vector mesons. We use tagged two-photon events to study the properties of
the observed enhancements and associate them with the production of f_1(1285)
and f_1(1420). Our non-observation of \eta(1440) is inconsistent by more than
two standard deviations with the first observation of this resonance in
two-photon collisions by the L3 experiment. We present our estimates for 90%
confidence level upper limits on the products of two-photon partial widths of
pseudoscalar hadrons and their branching fractions into
K^0_S(\pi^+\pi^-)K^\pm\pi^\mp.Comment: 24 pages postscript,also available through
http://www.lns.cornell.edu/public/CLNS/2004/, submitted to PR
Evidence for B^(*)_s bar{B}^(*)_s Production at the Upsilon(5S)
Using data collected by the CLEO III detector at CESR, we started a series of
investigations on the Upsilon(5S) resonance decay properties. The data sample
used for this analysis consists of 0.42 fb-1 of data taken on the Upsilon(5S)
resonance, 6.34 fb-1 of data collected on the Upsilon(4S) and 2.32 fb-1 of data
taken in the continuum below the Upsilon(4S). B_s mesons are expected to decay
predominantly into D_s meson, while the lighter B mesons decay into D_s only
about 10% of the time. We exploit this difference to make a preliminary model
dependent estimate of the ratio of B_s(*) anti-B_s(*) to the total b anti-b
quark pair production at the Upsilon(5S) energy to be (21 +- 3 +- 9)%.Comment: 17 pages postscript,also available through
http://www.lns.cornell.edu/public/CONF/2004/, Presented at ICHEP Aug
16-22,2004, Beijing, Chin
Photon transitions in Upsilon(2S) and Upsilon(3S)
We have studied the inclusive photon spectra in Upsilon(2S) and \Upsilon(3S)
decays using a large statistics data sample obtained with the CLEO III
detector. We present the most precise measurements of electric dipole (E1)
photon transition rates and photon energies for Upsilon(2S)->gamma chi_bJ(1P)
and Upsilon(3S)->gamma chi_bJ(2P) J=0,1,2. We measure the rate for a rare E1
transition Upsilon(3S)->gamma chi_b0(1P) for the first time. We also set upper
limits on the rates for the hindered magnetic dipole (M1) transitions to the
eta_b(1S) and eta_b(2S) states.Comment: 10 pages postscript,also available through
http://www.lns.cornell.edu/public/CLNS/2004/, submitted to PR
Limits on Neutral D Mixing in Semileptonic Decays
Using the CLEO II.V detector observing e+e- collisions at around 10.6 GeV we
search for neutral D mixing in semileptonic D0 decays tagged in charged D*
decays. Combining the results from the Kenu and K*enu channels we find that the
rate for D mixing is less than 0.0078 at 90% C.L.Comment: 9 pages postscript,also available through
http://www.lns.cornell.edu/public/CLNS/2005/, submitted to PR
Radiative Decays of the Upsilon(1S) to a Pair of Charged Hadrons
Using data obtained with the CLEO~III detector, running at the Cornell
Electron Storage Ring (CESR), we report on a new study of exclusive radiative
Upsilon(1S) decays into the final states gamma pi^+ pi^-, gamma K^+ K^-, and
gamma p pbar.. We present branching ratio measurements for the decay modes
Upsilon(1S) to gamma f_2(1270), Upsilon(1S) to gamma f_2'(1525), and
Upsilon(1S) to gamma K^+K^-; helicity production ratios for f_2(1270) and
f_2'(1525); upper limits for the decay Upsilon(1S) to gamma f_J(2200), with
f_J(2220) to pi^+ pi^-, K^+ K^-, p pbar; and an upper limit for the decay
Upsilon(1S) to gamma X(1860), with X(1860) to gamma p pbar.Comment: 17 pages postscript,also available through
http://www.lns.cornell.edu/public/CLNS/2005/, Submitted to PR
Study of dipion transitions among Upsilon(3S), Upsilon(2S), and Upsilon(1S) states
We present measurements of decay matrix elements for hadronic transitions of the form Upsilon(nS)-\u3eUpsilon(mS)pi pi, where (n,m)=(3,1),(2,1),(3,2). We reconstruct charged and neutral pion modes with the final state Upsilon decaying to either mu(+)mu(-) or e(+)e(-). Dalitz plot distributions for the 12 decay modes are fit individually as well as jointly assuming isospin symmetry, thereby measuring the matrix elements of the decay amplitude. We observe and account for the anomaly previously noted in the dipion invariant mass distribution for the Upsilon(3S)-\u3eUpsilon(1S)pi pi transition and obtain good descriptions of the dynamics of the decay using the most general decay amplitude allowed by partial conservation of the axial-vector current considerations. The fits further indicate that the Upsilon(2S)-\u3eUpsilon(1S)pi pi and Upsilon(3S)-\u3eUpsilon(2S)pi pi transitions also show the presence of terms in the decay amplitude that were previously ignored, although at a relatively suppressed level
Study of Di-Pion Transitions Among Upsilon(3S), Upsilon(2S), and Upsilon(1S) States
We present measurements of decay matrix elements for hadronic transitions of
the form Upsilon(nS) -> pi pi Upsilon(mS) where (n, m) = (3, 1), (2, 1), and
(3, 2). We reconstruct charged and neutral pion modes with the final state
Upsilon decaying to either mu+mu- or e+e-. Dalitz plot distributions for the
twelve decay modes are fit individually as well as jointly assuming isospin
symmetry, thereby measuring the matrix elements of the decay amplitude. We
observe and account for the anomaly previously noted in the di-pion invariant
mass distribution for the Upsilon(3S) -> pi pi Upsilon(1S) transition and
obtain good descriptions of the dynamics of the decay using the most general
decay amplitude allowed by partial conservation of the axial-vector current
(PCAC) considerations. The fits further indicate that the Upsilon(2S) -> pi pi
Upsilon(1S) and Upsilon(3S) -> pi pi Upsilon(2S) transitions also show the
presence of terms in the decay amplitude that were previously ignored, although
at a relatively suppressed level.Comment: 24 pages postscript,also available through
http://www.lns.cornell.edu/public/CLNS/2007/, Accepted by PRD, one new table,
one reworked figur
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