arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0709.2378hep-ph
收藏

强子对撞机上的大质量色八重玻色子和共振对

Massive color-octet bosons and pairs of resonances at hadron colliders

Bogdan A. Dobrescu, Kyoungchul Kong, Rakhi Mahbubani

摘要:

我们分析了大质量的色八重玻色子的耦合到夸克被抑制对撞机签名。规范不变性迫使八重态在树的层次上只能成对地与胶子耦合,其强度由QCD规范耦合决定。对于自旋为1的八重态,在强子对撞机上产生对的截面大于相同质量的夸克。八重体衰变为两个喷流,导致4喷流特征,其中两对喷流形成相同质量的共振。对于自旋为0的八隅体,截面较小,并且主要衰变为b \bar{b},或者如果运动学允许的话,衰变为t \bar{t}。我们估计,在Tevatron上发现自旋为1的八隅体的可能性高达330 GeV,在LHC上发现1 TeV的可能性为1 fb^{-1},而自旋为0的八隅体的可能性要低一些。

英文摘要:

We analyze collider signatures of massive color-octet bosons whose couplings to quarks are suppressed. Gauge invariance forces the octets to couple at tree level only in pairs to gluons, with a strength set by the QCD gauge coupling. For a spin-1 octet, the cross section for pair production at hadron colliders is larger than that for a quark of equal mass. The octet decays into two jets, leading to a 4-jet signature with two pairs of jets forming resonances of the same mass. For a spin-0 octet the cross section is smaller, and the dominant decay is into b\bar{b}, or t\bar{t} if kinematically allowed. We estimate that discovery of spin-1 octets is possible for masses up to 330 GeV at the Tevatron, and 1 TeV at the LHC with 1 fb^{-1}, while the reach is somewhat lower for spin-0 octets.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑