Publication
Search for new physics with long-lived particles decaying to photons and missing energy in $pp$ collisions at $\sqrt{s}=7$ TeV
| dc.contributor.author | CMS collaboration (2198 authors) | |
| dc.contributor.author | Hollar, Jonathan | |
| dc.contributor.author | Nayak, Aruna | |
| dc.contributor.author | Almeida, Nuno | |
| dc.contributor.author | Bargassa, Pedrame | |
| dc.contributor.author | David Tinoco Mendes, Andre | |
| dc.contributor.author | Faccioli, Pietro | |
| dc.contributor.author | Ferreira Parracho, Pedro Guilherme | |
| dc.contributor.author | Gallinaro, Michele | |
| dc.contributor.author | Seixas, Joao | |
| dc.contributor.author | Varela, Joao | |
| dc.contributor.author | Vischia, Pietro | |
| dc.contributor.author | Lloret Iglesias, Lara | |
| dc.contributor.author | Musella, Pasquale | |
| dc.contributor.author | Rodrigues Antunes, Joao | |
| dc.contributor.author | Silva, Pedro | |
| dc.contributor.author | Pela, Joao | |
| dc.contributor.author | Leonardo, Nuno | |
| dc.date.accessioned | 2019-02-03T20:24:32Z | |
| dc.date.available | 2019-02-03T20:24:32Z | |
| dc.date.issued | 2012-07 | |
| dc.date.updated | 2019-02-03T20:24:32Z | |
| dc.description.abstract | A search is performed for long-lived neutral particles decaying into a photon and invisible particles. An example of such a signature is the decay of the lightest neutralino with nonzero lifetime into a gravitino and a photon in gauge-mediated supersymmetry, with the neutralino as the next-to-lightest supersymmetric particle and the gravitino as the lightest. The search uses events containing photons, missing transverse energy, and jets. The impact parameter of the photon relative to the beam-beam collision point can be reconstructed using converted photons. The method is sensitive to lifetimes of the order of 0.1 to 1 ns. The data sample corresponds to an integrated luminosity of 2.23 inverse femtobarns in pp collisions at sqrt(s) = 7 TeV, recorded in the first part of 2011 by the CMS experiment at the LHC. Cross-section limits are presented on pair production for such particles, each of which decays into a photon and invisible particles. The observed 95% confidence level limits vary between 0.11 and 0.21 pb, depending on the neutral particle lifetime. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | JHEP 1211 (2012) 172; DOI 10.1007/JHEP11(2012)172 | |
| dc.identifier.uri | http://dx.doi.org/10.1007/JHEP11(2012)172 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26213 | |
| dc.language.iso | eng | |
| dc.title | Search for new physics with long-lived particles decaying to photons and missing energy in $pp$ collisions at $\sqrt{s}=7$ TeV | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |