284 research outputs found
Story of a journey: Rutherford to the Large Hadron Collider and onwards
In this article, I set out arguments why the Large Hadron Collider (LHC) :
the machine and the experiments with it, are a watershed for particle physics.
I give a historical perspective of the essential link between development of
particle accelerators and that in our knowledge of the laws governing
interactions among the fundamental particles, showing how this journey has
reached destination LHC. I explain how the decisions for the LHC design; the
energy and number of particles in the beam, were arrived at. I will end by
discussing the LHC physics agenda and the time line in which the particle
physicists hope to achieve it.Comment: 30 pages, 6 figures, LaTe
Physics potential of the LHC
The basic aim of physics studies at the LHC is to unravel the mechanism
responsible for the spontaneous symmetry breaking in the Standard Model (SM).
In the currently accepted theoretical picture, this translates into finding
`direct' experimental evidence for the Higgs sector. TeV scale supersymmetry
(SUSY) provides a very attractive solution to the `naturalness' problem that
theories with elementary scalar fields have. Hence in this talk I will
summarise the physics potential of the LHC for searching for Higgs and
Supersymmetry as well as for measurement of the parameters of the Higgs sector
and the SUSY model. Theories with localised gravity (and large extra
dimensions) give a credible option to have Standard Model without the attendant
`naturalness' problems. I will therefore also summarise the potential of LHC to
probe these `large' extra dimensions.Comment: Invited talk at the Asia Pacific Physics Conference 2000 and III ACFA
Linear Collider Workshop, 19 pages, 11 figures, LaTe
LHC-ILC synergy
I will begin by making a few general comments on the synergy between the
Large Hadron Collider (LHC) which will go in action in 2007 and the
International Linear Collider (ILC) which is under planning. I will then focus
on the synergy between the LHC and the PLC option at the ILC, which is expected
to be realised in the later stages of the ILC program. In this I will cover the
possible synergy in the Higgs sector (with and without CP violation), in the
determination of the anomalous vector boson couplings and last but not the
least, in the search for extra dimensions and radions.Comment: 12 pages,8 figures, uses appolb.cls, talk presented at the PLC2005
workshop, Kazimierz, Poland, 5-8 September, to appear in Acta Physics
Polonic
SUSY and SUSY Breaking Scale at the Linear Collider
After summarising very briefly the key features of different model
predictions for sparticle masses and their relation with the supersymmetry
(SUSY) breaking scales and parameters, I discuss the capabilities of an Linear Collider (LC) with 500 GeV for precision
measurements of sparticle properties. Then I focus on the lessons one can learn
about the scale and mechanism of SUSY breaking from these measurements and
point out how LC can crucially complement and extend the achievements of the
LHC. I end by mentioning what would be the desired extensions in the
type/energy of the colliding particles and their luminosity from the point of
view of SUSY investigations.Comment: 28 pages, 17 figures, LaTeX, uses aipproc.cls and aipproc.sty.
Plenary talk given at the International Linear Collider Workshop (LCWS) 2000,
October 26-30, 2000, Fermila
Physics Potential of the Next Generation Colliders
In this article I summarize some aspects of the current status of the field
of high energy physics and discuss how the next generation of high energy
colliders will aid in furthering our basic understanding of elementary
particles and interactions among them, by shedding light on the mechanism for
the spontaneous breakdown of the Electroweak Symmetry.Comment: 42 pages, 27 figures, LaTeX, Invited article for the special issue on
High Energy Physics of the Indian Journal of Physics on the occasion of its
Platinum Jubile
Supersymmetry at the PLC
In this talk I will begin with a very brief discussion as to why TeV scale
Supersymmetry forms an important subject of the studies at all the current and
future Colliders. Then, I will give different examples where the Photon Linear
Collider, PLC, will be able to make unique contributions. PlC's most important
role is in the context of Higgs Physics, due to its ability of accurate
determination of as well as the possibilities it
offers for the determination of the CP property of the Higgs boson and of
possible CP mixing in the Higgs sector. Further, the PLC can provide probes of
SUSY in the regions of the SUSY parameter space, which are either difficult or
inaccessible at the LHC and also in the mode of the International
Linear Collider (ILC).Comment: 14 pages, LaTeX, 8 figures, uses appolb.cls, included in the
submission, talk presented at the PLC2005 workshop, Kazimierz Sept. 5-8,
2005, To appear in Acta Physica Polonic
Photon Structure Function
After briefly explaining the idea of photon structure functions (\f2gam\ ,
\flgam) I review the current theoretical and experimental developements in the
subject of extraction of \qvph\ from a study of the Deep Inelastic Scattering
(DIS). I then end by pointing out recent progress in getting information about
the parton content of the photon from hard processes other than DIS.Comment: 14 pages, 6 postscript figures, latex, uses equation.sty and
epsfig.sty .sty files not adde
SUSY at the Linear Colliders: Working Group Summary
I summarise the activities of the different members of the SUSY working
group. There have been two major areas of activity: 1) precision measurement of
the SUSY particle masses/couplings and hence those of the SUSY model
parameters, 2) investigations into SUSY searches at \eplem, \gamgam, \game
and \emem colliders, in the nonstandard scenarios such as explicit CP
violation, R-parity violation and Anomaly Mediated Supersymmtery Breaking. In
addition there have been studies which looked at the effect of `large' extra
dimensions at the various colliders mentioned above.Comment: Presented at the III ACFA Linear Collider Workshop, 16 pages, 8
figures, LaTe
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