Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at root s=8 TeV
- Title
- Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at root s=8 TeV
- Author
- 김태정
- Keywords
- PARTON DISTRIBUTIONS; LHC; COMPUTATION; SIMULATION; EXISTENCE; MODEL
- Issue Date
- 2016-03
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW D, v. 93, NO 5, Article number 052011, Page. 1-1
- Abstract
- A search for evidence of particle dark matter (DM) and unparticle production at the LHC has been performed using events containing two charged leptons, consistent with the decay of a Z boson, and large missing transverse momentum. This study is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 fb(-1) of pp collisions at the LHC at a center-of-mass energy of 8 TeV. No significant excess of events is observed above the number expected from the standard model contributions. The results are interpreted in terms of 90% confidence level limits on the DM-nucleon scattering cross section, as a function of the DM particle mass, for both spin-dependent and spin-independent scenarios. Limits are set on the effective cutoff scale., and on the annihilation rate for DM particles, assuming that their branching fraction to quarks is 100%. Additionally, the most stringent 95% confidence level limits to date on the unparticle model parameters are obtained.
- URI
- https://journals.aps.org/prd/abstract/10.1103/PhysRevD.93.052011http://hdl.handle.net/20.500.11754/34410
- ISSN
- 2470-0010; 2470-0029
- DOI
- 10.1103/PhysRevD.93.052011
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
- Files in This Item:
- Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at root s=8 TeV.pdfDownload
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