The other effective fermion compositeness

Bellazzini, Brando; Riva, Francesco; Serra, Javi; Sgarlata, Francesco

doi:10.1007/jhep11(2017)020

Cited by 57 publications

(51 citation statements)

References 94 publications

(204 reference statements)

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“…We work in the simplified limit where all SUSY partners are heavy m sus y ≈ F so that the physics of Goldstini at E F ≡ M can be described in a formalism that parallels the CCWZ construction [41,42], adapted to the breaking of spacetime symmetries [43][44][45]. The coset representative can be written as…”

Section: Fermionic Dark Mattermentioning

confidence: 99%

Strongly Interacting Light Dark Matter

2017

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We discuss a class of Dark Matter (DM) models that, although inherently strongly coupled, appear weakly coupled at small-energy and fulfill the WIMP miracle, generating a sizable relic abundance through the standard freeze-out mechanism. Such models are based on approximate global symmetries that forbid relevant interactions; fundamental principles, like unitarity, restrict these symmetries to a small class, in such a way that the leading interactions between DM and the Standard Model are captured by effective operators up to dimension-8. The underlying strong coupling implies that these interactions become much larger at high-energy and represent an interesting novel target for LHC missing-energy searches.

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Section: Fermionic Dark Mattermentioning

confidence: 99%

Strongly Interacting Light Dark Matter

2017

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“…These positivity bounds have found several applications, including the proof of the a-theorem [4,5], the study of chiral perturbation theory [6], W W -scattering and theories of composite Higgs [7][8][9][10][11][12], as well as quantum gravity [13], massive gravity [14][15][16], Galileons [16][17][18][19], inflation [20,21], the weak gravity conjecture [22,23] and conformal field theory [24][25][26]. The approach has been recently extended to particles of arbitrary spin [16], with applications to massive gravity and the EFT of a Goldstino [27][28][29], and it has led to the formulation of a general no-go theorem on the leading energy-scaling behavior of the amplitudes in the IR [16]. Ref.…”

Section: Introductionmentioning

confidence: 99%

Beyond Positivity Bounds and the Fate of Massive Gravity

et al. 2018

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We constrain effective field theories by going beyond the familiar positivity bounds that follow from unitarity, analyticity, and crossing symmetry of the scattering amplitudes. As interesting examples, we discuss the implications of the bounds for the Galileon and ghost-free massive gravity. The combination of our theoretical bounds with the experimental constraints on the graviton mass implies that the latter is either ruled out or unable to describe gravitational phenomena, let alone to consistently implement the Vainshtein mechanism, down to the relevant scales of fifth-force experiments, where general relativity has been successfully tested. We also show that the Galileon theory must contain symmetry-breaking terms that are at most one-loop suppressed compared to the symmetry-preserving ones. We comment as well on other interesting applications of our bounds.

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“…The present bound from ATLAS dijet measurement [62] at 13 TeV with the integrated luminosity of 15.7 fb −1 is given by (see Refs. [63,64])…”

Section: Partially Composite Fermionsmentioning

confidence: 99%

Prospects for precision measurement of diboson processes in the semileptonic decay channel in future LHC runs

Liu

Wang

2019

Phys. Rev. D

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Precision measurements at the LHC are complementary to direct new physics searches. The high-energy distribution of diboson processes [WW, WZ, VðW; ZÞh] is a promising place, with the possibility of significant improvement in sensitivity as the data accumulates. We focus on the semileptonic final states and make projections of the reach for future runs of the LHC with integrated luminosities of 300 fb −1 and 3 ab −1 . In the semileptonic channel of WV, we have employed a combination of kinematical distributions of both the W and Z and their decay products to select the longitudinally polarized W and Z to enhance the sensitivity. The measurement in this channel can surpass the sensitivity of the precision measurement at LEP, and they can be significantly more sensitive than the HL-LHC h → Zγ measurements. Compared with the fully leptonic channel, the reach from the semileptonic channel can be better with effective suppression of the reducible background and systematic error. We also considered the reaches on the new physics mass scale in different new physics scenarios, including the strongly interacting light Higgs (SILH), the strongly coupled multipole interaction (Remedios), and the class of models with partially composite fermions.

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The other effective fermion compositeness

Cited by 57 publications

References 94 publications

Strongly Interacting Light Dark Matter

Strongly Interacting Light Dark Matter

Beyond Positivity Bounds and the Fate of Massive Gravity

Prospects for precision measurement of diboson processes in the semileptonic decay channel in future LHC runs

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