Hadron colliders as the ``neutralino factory'': Search for a slow decay of the lightest neutralino at the CERN LHC

Details Hadron colliders as the ``neutralino factory'': Search for a slow decay of the lightest neutralino at the CERN LHC Hadron colliders as the ``neutralino factory'': Search for a slow decay of the lightest neutralino at the CERN LHC

1997-06-17

arxiv.org/abs/hep-ph/9706382v2

Phys.Rev. D57 (1998) 554-566

Physics

High Energy Physics

High Energy Physics - Phenomenology

44 pages (LaTeX) including 26 figures, one reference added

Scientific paper

10.1103/PhysRevD.57.554

Prospects are examined for the detection of a slow decay of the lightest neutralino (or any other longlived particles) at the CERN LHC and at Very Large Hadron Collider (VLHC). We first point out that such hadron colliders will become the ``neutralino factory'' producing 10^6--10^9 neutralinos/yr, if gluinos and/or squarks actually exist below O(1) TeV. The lightest neutralino (\neu), usually assumed to be stable, will be unstable if lighter superparticles such as the gravitino (\gra) or axino (\axi) exist, or R-parity is not conserved. The decay signal would, however, be missed in usual collider experiments, particularly when the decay mostly occurs outside the detector. In order to search for such a slow decay of \neu, we propose a dedicated experiment where the collision products are dumped by a thick shield, which is followed by a long decay tunnel. The decay product of \neu can be detected by a detector located at the end of the tunnel. The slow arrival time and the large off angle (to the direction of the interaction point) of the decay product will provide a clear signature of slowly decaying \neu's. One can explore the decay length (c\tau) in a wide range, i.e., 0.2 m to 1x10^5 km for \mneu=25 GeV and 1 m to 2 km for \mneu=200 GeV at the LHC. This corresponds to the range of the SUSY breaking scale \rtF=2x10^5 to 2x10^7 GeV in case of the \neu\to\gamma\gra decay predicted in gauge-mediated SUSY breaking models. At VLHC, one can extend the explorable range of \mneu up to 1000 GeV, and that of \rtF up to 1x10^8 GeV. In case of the \neu\to\gamma\axi decay, the Peccei- Quinn symmetry breaking scale F_a can be explored up to 5x10^11 GeV. The mass of the decaying particle can be determined by using the correlation between the energy and the arrival time of the decay product.

Affiliated with

Also associated with

No associations

Rating

Hadron colliders as the ``neutralino factory'': Search for a slow decay of the lightest neutralino at the CERN LHC does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hadron colliders as the ``neutralino factory'': Search for a slow decay of the lightest neutralino at the CERN LHC, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hadron colliders as the ``neutralino factory'': Search for a slow decay of the lightest neutralino at the CERN LHC will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-277979