Publication
Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at $\sqrt s=$ 8 TeV
dc.contributor.author | CMS collaboration (2300 authors) | |
dc.contributor.author | Hollar, Jonathan | |
dc.contributor.author | Calpas, Betty | |
dc.contributor.author | Nayak, Aruna | |
dc.contributor.author | Bargassa, Pedrame | |
dc.contributor.author | Beirão Da Cruz E Silva, Cristóvão | |
dc.contributor.author | Di Francesco, Agostino | |
dc.contributor.author | Faccioli, Pietro | |
dc.contributor.author | Ferreira Parracho, Pedro Guilherme | |
dc.contributor.author | Gallinaro, Michele | |
dc.contributor.author | Leonardo, Nuno | |
dc.contributor.author | Lloret Iglesias, Lara | |
dc.contributor.author | Nguyen, Federico | |
dc.contributor.author | Rodrigues Antunes, Joao | |
dc.contributor.author | Seixas, Joao | |
dc.contributor.author | Toldaiev, Oleksii | |
dc.contributor.author | Vadruccio, Daniele | |
dc.contributor.author | Varela, Joao | |
dc.contributor.author | Vischia, Pietro | |
dc.contributor.author | David Tinoco Mendes, Andre | |
dc.contributor.author | Silva, Pedro | |
dc.contributor.author | Musella, Pasquale | |
dc.contributor.author | Pela, Joao | |
dc.date.accessioned | 2019-02-04T08:40:34Z | |
dc.date.available | 2019-02-04T08:40:34Z | |
dc.date.issued | 2016-03-22 | |
dc.date.updated | 2019-02-04T08:40:34Z | |
dc.description.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 Λ, 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. | |
dc.description.version | Peer Reviewed | |
dc.identifier | Phys.Rev. D97 (2018) 099903; DOI 10.1103/PhysRevD.93.052011, 10.1103/PhysRevD.97.099903 | |
dc.identifier.uri | http://dx.doi.org/10.1103/PhysRevD.93.052011, 10.1103/PhysRevD.97.099903 | |
dc.identifier.uri | http://hdl.handle.net/10400.26/26978 | |
dc.language.iso | eng | |
dc.title | Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at $\sqrt s=$ 8 TeV | |
dc.type | journal article | |
dspace.entity.type | Publication | |
rcaap.rights | openAccess | pt |
rcaap.type | article |