2,299 research outputs found
That is Northern Lights Cannabis Indica . . . No, It\u27s Marijuana: Navigating Through the Haze of Cannabis and Patents
By their very nature, patents are exclusionary. A patent grants the right to exclude others from making use of an invention or process. But patents are also tools to promote innovation. However, when an invalid patent is granted, the patent becomes an exclusionary tool that also chills innovation. Invalid cannabis patents may be chilling innovation in the cannabis market, but they may not be the only thing. While the Controlled Substances Act continues to prohibit cannabis at a federal level, researchers and medical professionals will be unsure of the legality of their actions. This naturally leads to another chilling effect in the use of cannabis in the medical field and within research firms. By amending the Controlled Substances Act loosen restrictions on marijuana, specifically in the fields of research and medicine, the federal government can help to promote innovation in the cannabis market. This approach could eliminate the gaps in cannabis research and knowledge that continue to plague the U.S. to this day
Radiative corrections to Higgs-boson production in association with top-quark pairs at e+ e- colliders
We have calculated the complete O(alpha) and O(alpha_s) radiative corrections
to the Higgs-production process e+ e- -> t anti-t H in the Standard Model. This
process is particularly interesting for the measurement of the top-quark Yukawa
coupling at a future e+ e- collider. The calculation of the O(alpha)
corrections is described in some detail including, in particular, the treatment
of the soft and collinear singularities. The discussion of numerical results
focuses on the total cross section as well as on angular and energy
distributions of the outgoing particles. The electroweak corrections turn out
to be sizable and can reach the order of +/-10%. They result from cancellations
between electromagnetic, fermionic, and weak bosonic corrections, each of which
are of the order of +/-10%.Comment: 32 pages, LaTeX, 12 postscript figure
Electroweak corrections to e+ e- -> f anti-f H
Some of the most interesting Higgs-production processes at future e+ e-
colliders are of the type e+ e- -> f anti-f H. We present a calculation of the
complete O(alpha) corrections to these processes in the Standard Model for
final-state neutrinos and top quarks. Initial-state radiation beyond O(alpha)
at the leading-logarithmic level as well as QCD corrections are also included.
The electroweak corrections turn out to be sizable and reach the order of
+/-10% and will thus be an important part of precise theoretical predictions
for future e+ e- colliders.Comment: 4 pages, LaTeX, 4 postscript figures, talk given at Loops and Legs
2004, 7th DESY Workshop on Elementary Particle Theory, Zinnowitz, German
QCD Corrections to t anti-b H^- Associated Production in e^+ e^- Annihilation
We calculate the QCD corrections to the cross section of e^+ e^- -> t anti-b
H^- and its charge-conjugate counterpart within the minimal supersymmetric
extension of the Standard Model. This process is particularly important if m_t
b H^+ and e^+ e^- -> H^+ H^- are
not allowed kinematically. Large logarithmic corrections that arise in the
on-mass-shell scheme of quark mass renormalization, especially from the t
anti-b H^- Yukawa coupling for large values of tan(beta), are resummed by
adopting the modified minimal-subtraction scheme, so that the convergence
behavior of the perturbative expansion is improved. The inclusion of the QCD
corrections leads to a significant reduction of the theoretical uncertainties
due to scheme and scale dependences.Comment: 21 pages (Latex), 8 figures (Postscript); detailed discussion of
scheme and scale dependences adde
MSSM Higgs bosons associated with high-pT jets at hadron colliders
The cross section for the production of the lightest neutral Higgs boson in
association with a high-pT hadronic jet, calculated in the framework of the
minimal supersymmetric standard model (MSSM), is presented. The expectations
for the hadronic cross section at the Large Hadron Collider are discussed using
reasonable kinematical cuts. In particular the contributions from superpartner
loops to the cross section and their dependence on the parameters of the MSSM
are investigated and found to be significant. Comparisons show that the
production rate for h0 + jet in the MSSM can differ widely from the
corresponding standard-model prediction.Comment: 20 page
NLO QCD corrections to pp -> ttbb+X via quark anti-quark annihilation
The process pp -> top anti-top bottom anti-bottom + X represents a very
important background reaction to searches at the LHC, in particular to top
anti-top H production where the Higgs boson decays into a bottom anti-bottom
pair. A successful analysis of top anti-top H at the LHC requires the knowledge
of direct top anti-top bottom anti-bottom production at NLO in QCD. We take the
first step in this direction upon calculating the NLO QCD corrections to the
subprocess initiated by quark anti-quark annihilation.Comment: 6 pages, LaTeX, 4 postscript figures, to appear in proceedings of the
"9th Workshop on Elementary Particle Theory: Loops and Legs in Quantum Field
Theory", Sondershausen, Germany, April 20-25, 200
Taijiquan the 'Taiji World' way: Towards a cosmopolitan vision of ecology.
In this article, we present a case study analysis of data gathered on the practice of the art of Taijiquan (Tai Chi Chuan) in one UK context. Our interest in looking at this physical culture was in exploring if/how physical cultures of shared embodied experience and practice may help âsow the seeds of environmental awarenessâ. In so doing, we illustrate certain affinities between this interpretation of the art and Beckâs idea of a âcosmopolitan vision of ecologyâ. We present an analysis of documentary and interview data of one English Taijiquan organisation and how it currently promotes the idea of interconnectedness, wellbeing and an alternative meta-narrative for living through the practice of Taijiquan. We conclude that, while further research is needed, there is evidence that a cosmopolitan vision for ecology is emerging in physical cultures such as Taijiquan
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