Hint for axial-vector contact interactions in the data on e+e- -> e+e-(gamma) at centre-of-mass energies 192-208 GeV
| dc.creator | Bourilkov, D. | |
| dc.date | 2001-04-17 | |
| dc.date.accessioned | 2026-07-07T10:32:50Z | |
| dc.date.available | 2026-07-07T10:32:50Z | |
| dc.description | For the first time the experiments ALEPH, DELPHI, L3 and OPAL have presented preliminary results for fermion-pair production in e+e- collisions on the full data set above the Z pole. A combined analysis of the Bhabha scattering measurements is performed to search for effects of contact interactions. In the case of two axial-vector (AA) currents the best fit to the data is 2.6 standard deviations away from the Standard Model expectation, corresponding to an energy scale $Λ= 10.3^{+2.8}_{-1.6}$ TeV for contact interactions. For other models no statistically significant deviations are observed, and the data are used to set lower limits at 95 % confidence level on the contact interaction scales ranging from 8.2 to 21.3 TeV, depending on the helicity structure. | |
| dc.description | 6 pages, 1 table, 3 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0104165 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0104165 | |
| dc.identifier | Phys.Rev.D64:071701,2001 | |
| dc.identifier | doi:10.1103/PhysRevD.64.071701 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/178895 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Hint for axial-vector contact interactions in the data on e+e- -> e+e-(gamma) at centre-of-mass energies 192-208 GeV | |
| dc.type | text |