7 research outputs found
K0s-K0s correlations in 7 TeV pp collisions from the ALICE experiment at the LHC
Identical neutral kaon pair correlations are measured in 7 TeV pp collisions
in the ALICE experiment. K0s-K0s correlation functions are formed in 3
multiplicity X 4 kT bins. The femtoscopic kaon source parameters Rinv and
lambda are extracted from these correlation functions by fitting a (femtoscopy)
X (PYTHIA) model to them, PYTHIA accounting for the non-flat baseline found in
pp collisions. Source parameters are obtained from a fit which includes quantum
statistics and final-state interactions of the a0/f0 resonance. K0s-K0s
correlations show a systematic increase in Rinv for increasing multiplicity bin
and decreasing Rinv for increasing kT bin as seen in pi-pi correlations in the
pp system, as well as seen in heavy-ion collisions. Also, K0s-K0s correlations
are observed to smoothly extend this pi-pi Rinv behavior for the pp system up
to about three times higher kT than the kT range measured in pi-pi
correlations.Comment: Proceedings of the Quark Matter 2011 Conference, 4 pages, 5 figure
Minimal Universal Extra Dimensions in CalcHEP/CompHEP
We present an implementation of the model of minimal universal extra
dimensions (MUED) in CalcHEP/CompHEP. We include all level-1 and level-2
Kaluza-Klein (KK) particles outside the Higgs sector. The mass spectrum is
automatically calculated at one loop in terms of the two input parameters in
MUED: the radius of the extra dimension and the cut-off scale of the model. We
implement both the KK number conserving and the KK number violating
interactions of the KK particles. We also account for the proper running of the
gauge coupling constants above the electroweak scale. The implementation has
been extensively cross-checked against known analytical results in the
literature and numerical results from other programs. Our files are publicly
available and can be used to perform various automated calculations within the
MUED model.Comment: 32 pages, 4 figures, 6 tables, invited contribution for New Journal
of Physics Focus Issue on 'Extra Space Dimensions', the model file can be
downloaded from http://home.fnal.gov/~kckong/mued
LHC String Phenomenology
We argue that it is possible to address the deeper LHC Inverse Problem, to
gain insight into the underlying theory from LHC signatures of new physics. We
propose a technique which may allow us to distinguish among, and favor or
disfavor, various classes of underlying theoretical constructions using
(assumed) new physics signals at the LHC. We think that this can be done with
limited data , and improved with more data. This is because of
two reasons -- a) it is possible in many cases to reliably go from
(semi)realistic microscopic string construction to the space of experimental
observables, say, LHC signatures. b) The patterns of signatures at the LHC are
sensitive to the structure of the underlying theoretical constructions. We
illustrate our approach by analyzing two promising classes of string
compactifications along with six other string-motivated constructions. Even
though these constructions are not complete, they illustrate the point we want
to emphasize. We think that using this technique effectively over time can
eventually help us to meaningfully connect experimental data to microscopic
theory.Comment: 50 Pages, 13 Figures, 3 Tables, v2: minor changes, references adde