On the Mass and Width of the Z-boson and Other Relativistic Quasistable Particles
| dc.creator | Bohm, Arno R. | |
| dc.creator | Harshman, N. L. | |
| dc.date | 2000-01-19 | |
| dc.date.accessioned | 2026-07-07T11:34:58Z | |
| dc.date.available | 2026-07-07T11:34:58Z | |
| dc.description | The ambiguity in the definition for the mass and width of relativistic resonances is discussed, in particular for the case of the Z-boson. This ambiguity can be removed by requiring that a resonance's width $Γ$ (defined by a Breit-Wigner lineshape) and lifetime $τ$ (defined by the exponential law) always and exactly fulfill the relation $Γ= \hbar/τ$. To justify this one needs relativistic Gamow vectors which in turn define the resonance's mass M_R as the real part of the square root $\rm{Re}\sqrt{s_R}$ of the S-matrix pole position s_R. For the Z-boson this means that $M_R \approx M_Z - 26{MeV}$ and $Γ_R \approx Γ_Z-1.2{MeV}$ where M_Z and $Γ_Z$ are the values reported in the particle data tables. | |
| dc.description | 23 pages | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0001206 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0001206 | |
| dc.identifier | Nucl.Phys.B581:91-115,2000 | |
| dc.identifier | doi:10.1016/S0550-3213(00)00249-2 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/198439 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Quantum Physics | |
| dc.title | On the Mass and Width of the Z-boson and Other Relativistic Quasistable Particles | |
| dc.type | text |