We introduce a novel mechanism for the leptoquark pair production at LHC that is of a t-channel topology and is quark-quark initiated. This mechanism operates under fairly general conditions. One of them is that the two leptoquarks in question couple to the same lepton and the other one is that the fermion numbers of these two leptoquarks differ by two. The strength of the proposed mechanism provides an alternative way to the conventional processes to efficiently constrain the parameter space of the two leptoquark scenarios at LHC whenever the aforementioned conditions are met. We accordingly present one case study to outline the physics potential of this novel production mechanism.

We introduce a novel mechanism for the leptoquark pair production at LHC that is of a t-channel topology and is quark-quark initiated. This mechanism operates under fairly general conditions. One of them is that the two leptoquarks in question couple to the same lepton and the other one is that the fermion numbers of these two leptoquarks differ by two. The strength of the proposed mechanism provides an alternative way to the conventional processes to efficiently constrain the parameter space of the two leptoquark scenarios at LHC whenever the aforementioned conditions are met. We accordingly present one case study to outline the physics potential of this novel production mechanism.

Leptoquarks are hypothetical bosonic particles with a unique property; they can transform quarks into leptons and vice versa. There is a large number of scientific articles that cover questions of the leptoquark production and ways of their detection at Large Hadron Collider (LHC). LHC can produce leptoquarks in several different ways. The production mechanism that is best studied in literature is the pair production which is dominant for small Yukawa couplings. However, with the increase of the Yukawa couplings, the phenomenology of leptoquarks becomes more interesting and diverse. Namely, for large Yukawa couplings there are also additional leptoquark production mechanisms: t-channel production, single production, Drell-Yan di-lepton production and a resonant production. Moreover, there has recently been introduced a novel leptoquark production mechanism that is of the t-channel topology which gives asymmetric leptoquark pairs in the final state. The novel production mechanism has the potential to be complementary to other leptoquark production mechanisms in limiting certain parts of the parameter space that is described by the relevant Yukawa couplings and leptoquark masses. This article will provide the most recent studies of that particular leptoquark production mechanism at LHC.

We investigate asymmetric leptoquark pair production mechanism at the Large Hadron Collider to advocate its potential relevance to establish reliable constraints on the leptoquark parameter space and its ability to aid in correct identification of these attractive sources of new physics. The main feature of asymmetric pair production that genuinely distinguishes it from the usual leptoquark pair production is given by the fact that the two leptoquarks that are produced in proton-proton collisions through a t-channel lepton exchange are not charge conjugates of each other. Hence the proposed name of asymmetric leptoquark pair production for this type of process. We spell out prerequisite conditions for the asymmetric leptoquark pair production mechanism to be operational and enumerate all possible combinations of leptoquark multiplets that can potentially generate it. We finally reinterpret existing leptoquark pair production search results within several simple scalar leptoquark extensions of the Standard Model, assuming that the leptoquarks exclusively couple to either electrons or muons and the first generation quarks, to demonstrate proper inclusion of asymmetric pair production. We consequently present accurate parameter space constraints for the S1, S3, R2, S1+S3, and S1+R2 leptoquark scenarios.

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