Leptoquark and vectorlike quark extended models as the explanation of the muon g-2 anomaly

Leptoquark (LQ) models can be the solution to the (g - 2)mu anomaly because of their chiral enhancements. In this work, we consider the models extended by the LQ and vectorlike quark (VLQ) simultaneously, which can be used to explain the anomaly because of the top quark and top partner (denoted as T) mixing. For the one-LQ and one-VLQ extended models, there are contributions from the top and T quarks. In the minimal LQ models, only the R2 and S1 representations can lead to the chiral enhancements. Here, we find one new S3 solution to the anomaly in the presence of a (X; T; B)L;R triplet. We also consider the one-LQ and two-VLQ extended models, which can solve the anomaly even in the absence of top interactions and mixings. Then, we propose new LQ search channels under the constraints of (g - 2)mu. Besides the traditional t mu decay channel, the LQ can also decay into T mu final states, which will lead to the characteristic multitop and multimuon signals at hadron colliders.

Automated summary

Leptoquark (LQ) models, together with vectorlike quark (VLQ) models, can explain the (g - 2)mu anomaly due to their chiral enhancements. The research considers one-LQ and one-VLQ extended models, where contributions from top quarks and top partners play a significant role. In addition, a new S3 solution to the anomaly is found in the presence of a (X; T; B)L;R triplet. New LQ search channels are proposed, including the decay of LQ into T mu final states, which can produce distinctive multitop and multimuon signals at hadron colliders.