Associated production of a neutral top-pion with a pair of heavy quarks in γγ collisions
Abstract
We study a neutral top-pion production process γγ→ff¯Π0t(f=t,b) in the top-color-assisted technicolor (TC2) model. We find that the cross section of γγ→tt¯Π0t is much larger than that of γγ→bb¯Π0t. On the other hand, the cross section can be obviously enhanced with increasing the c.m. energy. With (s)=1600 GeV, the cross section of tt¯Π0t production can reach the level of a few fb. The results show that γγ→tt¯Π0t→tt¯(tc¯) is the most ideal channel to detect a neutral top-pion due to the clean standard model (SM) background. With such sufficient signals and clean background, a neutral top-pion could be detected at DESY TESLA with a high c.m. energy.
- Publication:
-
Physical Review D
- Pub Date:
- February 2003
- DOI:
- 10.1103/PhysRevD.67.035005
- arXiv:
- arXiv:hep-ph/0209343
- Bibcode:
- 2003PhRvD..67c5005W
- Keywords:
-
- 12.60.Nz;
- 12.15.Lk;
- 14.65.Ha;
- 14.80.Mz;
- Technicolor models;
- Electroweak radiative corrections;
- Top quarks;
- Axions and other Nambu-Goldstone bosons;
- High Energy Physics - Phenomenology
- E-Print:
- 11 pages, 5 figures