Lepton Flavours at the Early LHC Experiments as the Footprints of the Dark Matter Producing Mechanisms
| dc.creator | Bhattacharyya, Nabanita | |
| dc.creator | Datta, Amitava | |
| dc.creator | Poddar, Sujoy | |
| dc.date | 2008-07-02 | |
| dc.date.accessioned | 2026-07-07T11:52:12Z | |
| dc.date.available | 2026-07-07T11:52:12Z | |
| dc.description | The mSUGRA parameter space corresponding to light sleptons well within the reach of LHC and relatively light squarks and gluinos (mass $\le$ 1 TeV) has three regions consistent with the WMAP data on dark matter relic density and direct mass bounds from LEP 2. Each region can lead to distinct leptonic signatures from squark-gluino events during the early LHC experiments (integrated luminosity $\sim 10 ~fb^{-1}$ or even smaller). In the much studied stau-LSP coannihilation region with a vanishing common trilinear coupling ($A_0$) at the GUT scale a large fraction of the final states contain electrons and / or muons and $e$ - $μ$ - $τ$ universality holds to a good approximation. In the not so well studied scenarios with non-vanishing $A_0$ both LSP pair annihilation and stau-LSP coannihilation could contribute significantly to the dark matter relic density for even smaller squark-gluino masses. Our simulations indicate that the corresponding signatures are final states rich in $τ$-leptons while final states with electrons and muons are suppressed leading to a violation of lepton universality. These features may be observed to a lesser extent even in the modified parameter space (with non-zero $A_0$) where the coannihilation process dominates. We also show that the generic $m$-leptons + $n$-jets+ $\not! E_T$ signatures without flavour tagging can also discriminate among the three scenarios. However, the signals become more informative if the $τ$ and $b$-jet tagging facilities at the LHC experiments are utilized. | |
| dc.description | 28 pages | |
| dc.identifier | https://arxiv.org/abs/0807.0278 | |
| dc.identifier | http://arxiv.org/abs/0807.0278 | |
| dc.identifier | Phys.Rev.D78:075030,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.075030 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/204153 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Lepton Flavours at the Early LHC Experiments as the Footprints of the Dark Matter Producing Mechanisms | |
| dc.type | text |