5,389 research outputs found
Opportunities with top quarks at future circular colliders
We describe various studies relevant for top physics at future circular
collider projects currently under discussion. We show how highly-massive
top-antitop systems produced in proton-proton collisions at a center-of-mass
energy of 100 TeV could be observed and employed for constraining top dipole
moments, investigate the reach of future proton-proton and electron-positron
machines to top flavor-changing neutral interactions, and discuss top parton
densities.Comment: 5 pages, 2 figures, 1 table; to appear in the proceedings of the "7th
International Workshop on Top Quark Physics", 28 Sep - 3 Oct 2014, Cannes,
Franc
Transverse-momentum, threshold and joint resummations for slepton pair production at hadron colliders
We present precision calculations of the transverse-momentum spectrum and the
invariant-mass distribution for slepton pair production at hadron colliders. We
implement the transverse-momentum, threshold and joint resummation formalisms
at the next-to-leading logarithmic accuracy and consistently match the obtained
result with the pure perturbative result at the first order in the strong
coupling constant, i.e. at order alpha_s. We give numerical predictions for
selectron and stau pair production, and compare the various resummed cross
sections with the perturbative result.Comment: Submitted for the SUSY07 proceedings, 4 pages, 4 eps figure
Slepton pair production at hadron colliders
In R-parity conserving supersymmetric models, sleptons are produced in pairs
at hadron colliders. We show that measurements of the longitudinal single-spin
asymmetry at possible polarization upgrades of existing colliders allow for a
direct extraction of the slepton mixing angle. A calculation of the
transverse-momentum spectrum shows the importance of resummed contributions at
next-to-leading logarithmic accuracy in the small and intermediate
transverse-momentum regions and little dependence on unphysical scales and
non-perturbative contributions.Comment: 4 pages, 3 figures, to appear in Proceedings of SUSY06, the 14th
International Conference on Supersymmetry and the Unification of Fundamental
Interactions, UC Irvine, California, 12-17 June 200
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