The shadow of dark matter as a shadow of string theory: string origin of the dipole term

Dick, Rainer

doi:10.1140/epjc/s10052-020-8106-4

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…We also include a string charge with mass dimension 1 to have canonical mass dimension 1 for the antisymmetric tensor field, such that the kinetic term for the Kalb–Ramond field strength in four spacetime dimensions can be written as . The Kalb–Ramond picture of gauge interactions between strings also includes dimensionless string boundary charges and a vector field which couples to the boundary of open string world sheets, This is appealing, because it yields a mass for the Kalb–Ramond field in the four-dimensional spacetime action, without breaking the KR gauge symmetries The string currents in ( 3 ) are from ( 1 , 2 ) They satisfy the consistency conditions The gauge invariant field 1 satisfies the equations of motion and These equations imply that the Kalb–Ramond field in the interaction picture is a transverse massive antisymmetric tensor field with mode expansion We choose polarization vectors such that for whereas , Comparison with the Kalb–Ramond field in Coulomb gauge [ 20 ] shows that the single completely transverse physical polarization state is given by , whereas the two (spatially longitudinal but 4d transverse) polarizations are unphysical. Therefore only generates external physical states for the Kalb–Ramond field, but the other transverse modes also contribute to virtual Kalb–Ramond exchange.…”

Section: Introductionmentioning

confidence: 99%

Constraints on antisymmetric tensor fields from Bhabha scattering

Tiwary

Dick

2021

Eur. Phys. J. C

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Antisymmetric tensor fields are a compelling prediction of string theory. This makes them an interesting target for particle physics because antisymmetric tensors may couple to electromagnetic dipole moments, thus opening a possible discovery opportunity for string theory. The strongest constraints on electromagnetic dipole couplings would arise from couplings to electrons, where these couplings would contribute to Møller and Bhabha scattering. Previous measurements of Bhabha scattering constrain the couplings to $${\tilde{M}}_e m_C>7.1\times 10^4\,{\mathrm {GeV}}^2$$ M ~ e m C > 7.1 × 10 4 GeV 2 , where $$m_C$$ m C is the mass of the antisymmetric tensor field and $${\tilde{M}}_e$$ M ~ e is an effective mass scale appearing in the electromagnetic dipole coupling.

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Section: Introductionmentioning

confidence: 99%

Constraints on antisymmetric tensor fields from Bhabha scattering

Tiwary

Dick

2021

Eur. Phys. J. C

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“…Comparison with the Kalb-Ramond field in Coulomb gauge [20] shows that the single completely transverse physical polarization state is given by ǫ…”

Section: Introductionmentioning

confidence: 99%

Constraints on antisymmetric tensor fields from Bhabha scattering

Tiwary,

Dick

2021

Preprint

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Antisymmetric tensor fields are a compelling prediction of string theory. This makes them an interesting target for particle physics because antisymmetric tensors may couple to electromagnetic dipole moments, thus opening a possible discovery opportunity for string theory. The strongest constraints on electromagnetic dipole couplings would arise from couplings to electrons, where these couplings would contribute to Møller and Bhabha scattering. Previous measurements of Bhabha scattering constrain the couplings to MemC > 7.1 × 10 4 GeV 2 , where mC is the mass of the antisymmetric tensor field and Me is an effective mass scale appearing in the electromagnetic dipole coupling.

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Cosmological implications of Kalb-Ramond-like particles

Capanelli,

Jenks,

Kolb

et al. 2024

J. High Energ. Phys.

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The Kalb-Ramond field is an antisymmetric, rank-two tensor field which most notably appears in the context of string theory, but has largely been unexplored in the context of cosmology. In this work, motivated by the Kalb-Ramond field in string theory, and antisymmetric tensor fields that emerge in effective field theories ranging from particle physics to condensed matter, we study the primordial production of interacting massive Kalb-Ramond-like-particles (KRLPs). KRLPs contain features of both dark photon and axion models, which can be appreciated via their duality properties. While the massless non-interacting KRLP is dual to a pseudoscalar, and the massive non-interacting KRLP is dual to a pseudovector, the interacting massive KRLP can be distinguished from its scalar and vector counterparts. We study early-universe production of KRLPs via the freeze-in mechanism, considering a ‘dark photon-like’ interaction, an ‘axion-like’ interaction, and a ‘Higgs portal’ interaction, as well as production via cosmological gravitational particle production. We find that as a dark matter candidate, KRLPs can be produced by all of the above mechanisms and account for the relic density of dark matter today for a wide range of masses. Finally, we comment on the potential to obtain both warm and cold dark matter subcomponents, and speculate on observational and experimental prospects.

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The shadow of dark matter as a shadow of string theory: string origin of the dipole term

Cited by 5 publications

References 21 publications

Constraints on antisymmetric tensor fields from Bhabha scattering

Constraints on antisymmetric tensor fields from Bhabha scattering

Constraints on antisymmetric tensor fields from Bhabha scattering

Cosmological implications of Kalb-Ramond-like particles

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