NLO QCD corrections to the resonant vector diquark production at the LHC

Das, Kasinath; Majhi, Swapan; Kumar, Santosh; Shivaji, Ambresh

doi:10.1007/jhep10(2015)122

Cited by 3 publications

(3 citation statements)

References 79 publications

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“…The literature on the phenomenology of diquarks is much more limited. It focuses on scalar diquarks [26] and predominantly looks at three aspects: LHC discovery reach for scalar diquarks [27][28][29][30][31][32][33][34][35][36][37][38][39][40], n −n oscillations mediated by scalar diquarks [7,34,[41][42][43][44][45][46] and baryogenesis [7,34,42,[44][45][46]. Studies of vector diquarks investigate only their LHC phenomenology [35,[47][48][49][50][51], concentrating on their interactions with quarks.…”

Section: Diquark Phenomenologymentioning

confidence: 99%

Baryon number and lepton universality violation in leptoquark and diquark models

2018

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We perform a systematic study of models involving leptoquarks and diquarks with masses well below the grand unification scale and demonstrate that a large class of them is excluded due to rapid proton decay. After singling out the few phenomenologically viable color triplet and sextet scenarios, we show that there exist only two leptoquark models which do not suffer from tree-level proton decay and which have the potential for explaining the recently discovered anomalies in B meson decays. Both of those models, however, contain dimension five operators contributing to proton decay and require a new symmetry forbidding them to emerge at a higher scale. This has a particularly nice realization for the model with the vector leptoquark (3, 1) 2/3 , which points to a specific extension of the Standard Model, namely the Pati-Salam unification model, where this leptoquark naturally arises as the new gauge boson. We explore this possibility in light of recent B physics measurements. Finally, we analyze also a vector diquark model, discussing its LHC phenomenology and showing that it has nontrivial predictions for neutron-antineutron oscillation experiments. 6

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Section: Diquark Phenomenologymentioning

confidence: 99%

Baryon number and lepton universality violation in leptoquark and diquark models

2018

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“…In the absence of flavor symmetries [35,36], there are very strong constraints on the couplings of these particles [37]. NLO corrections to diquark production [38,39] and the showering of sextet particles [40] have been studied as well.…”

Section: A Scalar Diquarksmentioning

confidence: 99%

Color discriminant variable and scalar diquarks at the LHC

et al. 2015

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The LHC is actively searching for narrow dijet resonances corresponding to physics beyond the Standard Model. Among the many resonances that have been postulated (e.g., colored vectors, scalars, and fermions) one that would have a particularly large production rate at the LHC would be a scalar diquark produced in the s-channel via fusion of two valence quarks. In previous work, we introduced a color discriminant variable that distinguishes among various dijet resonances, drawing on measurements of the dijet resonance mass, total decay width and production cross-section. Here, we show that this model-independent method applies well to color-triplet and color-sextet scalar diquarks, distinguishing them clearly from other candidate resonances. We also introduce a more transparent theoretical formulation of the color discriminant variable that highlights its relationship to the branching ratios of the resonance into incoming and outgoing partons and to the properties of those partons. While the original description of the color discriminant variable remains convenient for phenomenological use upon discovery of a new resonance, the new formulation makes it easier to predict the value of the variable for a given class of resonance.

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“…see Refs. [41][42][43]). Note that we have classified the choice of models based on the intrinsic spin of the resonance in the dijet signal.…”

Section: Dijet Resonancesmentioning

confidence: 99%

Improving heavy dijet resonance searches using jet substructure at the LHC

2021

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The search for new physics at high energy accelerators has been at the crossroads with very little hint of signals suggesting otherwise. The challenges at a hadronic machine such as the LHC is compounded by the fact that final states are swamped with jets which one needs to understand and unravel. A positive step in this direction would be to separate the jets in terms of their gluonic and quark identities, much in a similar spirit of distinguishing heavy quark jets from light quark jets that has helped in improving searches for both neutral and charged Higgs bosons at the LHC. In this work, we utilise this information using the jet substructure techniques to comment on possible improvements in sensitivity as well as discrimination of new resonances in the all hadronic mode that would be crucial in pinning down new physics signals at HL-LHC, HE-LHC and any future 100 TeV hadron collider.

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NLO QCD corrections to the resonant vector diquark production at the LHC

Cited by 3 publications

References 79 publications

Baryon number and lepton universality violation in leptoquark and diquark models

Baryon number and lepton universality violation in leptoquark and diquark models

Color discriminant variable and scalar diquarks at the LHC

Improving heavy dijet resonance searches using jet substructure at the LHC

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