Constraining the string scale: from Planck to weak and back again

Abel, Steven; Santiago, José

doi:10.1088/0954-3899/30/3/r01

Cited by 43 publications

(37 citation statements)

References 101 publications

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“…Additionally, there are kinetic mixing terms which couple the abelian gauge field strength of the visible sector (e.g. U(1) Y ) with the U(1) D3 of the hidden sector [53][54][55][56][57][58][59][60][61][62][63][64][65][66]. Given the gauge field strengths of the visible and hidden sectors F vis and F hid , we have [33]:…”

Section: Probing the Standard Model With A D3-branementioning

confidence: 99%

Baryon and dark matter genesis from strongly coupled strings

Heckman¹,

Rey

2011

J. High Energ. Phys.

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D3-brane probes of E-type Yukawa points lead to strongly coupled nearly conformal sectors nearby the Standard Model (visible sector) which are motivated by F-theory GUTs. Realistic visible sector brane configurations induce a seesaw mass hierarchy in the hidden sector with light GUT singlets charged under a strongly coupled hidden sector U(1). Interpreting these GUT singlets as dark matter, this leads to a matter genesis scenario where the freeze out and subsequent decay of heavy mediators between the two sectors simultaneously populates comparable amounts of baryon and dark matter asymmetry. Generating a net matter asymmetry requires a generational structure in the probe sector which is absent at weak string coupling, but is automatically realized at strong string coupling via towers of dyonic bound states corresponding to multi-prong string junctions. The hidden U(1) couples to the visible sector through both electric and magnetic kinetic mixing terms, providing an efficient means to deplete the symmetric component of dark matter. The mass of the dark matter is of order ∼ 10 GeV. The dark matter mass and the matter asymmetry are both controlled by the scale of conformal symmetry breaking ∼ 10 9 − 10 13 GeV, with the precise relation between the two set by details of the visible sector brane configuration.

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Section: Probing the Standard Model With A D3-branementioning

confidence: 99%

Baryon and dark matter genesis from strongly coupled strings

Heckman¹,

Rey

2011

J. High Energ. Phys.

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“…Several years later, more precise observations did not confirm any anomaly in the cosmic background radiation spectrum [15] and the interest for paraphoton decreased, although its existence was not excluded. More recently, it was found out that similar additional U(1) gauges generally appear in string embeddings of the standard model [16], reviving the interest for experimental limits on the paraphoton parameters [17,18,19].…”

Section: Introductionmentioning

confidence: 99%

Search for photon oscillations into massive particles

et al. 2008

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Recently, axion-like particle search has received renewed interest, and several groups have started experiments. In this paper, we present the final results of our experiment on photon-axion oscillations in the presence of a magnetic field, which took place at LULI (Laboratoire pour l'Utilisation des Lasers Intenses, Palaiseau, France). Our null measurement allowed us to exclude the existence of axions with inverse coupling constant M > 9. × 10 5 GeV for low axion masses and to improve the preceding BFRT limits by a factor 3 or more for axion masses 1.1 meV < ma < 2.6 meV. We also show that our experimental results improve the existing limits on the parameters of a low mass hidden-sector boson usually dubbed "paraphoton" because of its similarity with the usual photon. We detail our apparatus which is based on the "light shining through the wall" technique. We compare our results to other existing ones.

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“…This is a four-dimensional N = 2 superconformal field theory which enjoys an SU (2) flavor symmetry. 7 Now, in this theory, there is a single U (1) subalgebra of SU (2), so we have our Coulomb branch parameter u and a single complex scalar parameterizing breaking patterns of the flavor symmetry. It therefore suffices to introduce mass parameters m 1 and m 2 transforming in the doublet representation.…”

Section: The H 1 Argyres-douglas Theorymentioning

confidence: 99%

Kinetic mixing at strong coupling

et al. 2017

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A common feature of many string-motivated particle physics models is additional strongly coupled U (1)'s. In such sectors, electric and magnetic states have comparable mass, and integrating out modes also charged under U (1) hypercharge generically yields CP preserving electric kinetic mixing and CP violating magnetic kinetic mixing terms. Even though these extra sectors are strongly coupled, we show that in the limit where the extra sector has approximate N = 2 supersymmetry, we can use formal methods from Seiberg-Witten theory to compute these couplings. We also calculate various quantities of phenomenological interest such as the cross section for scattering between visible sector states and heavy extra sector states, as well as the effects of supersymmetry breaking induced from coupling to the MSSM.

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Constraining the string scale: from Planck to weak and back again

Cited by 43 publications

References 101 publications

Baryon and dark matter genesis from strongly coupled strings

Baryon and dark matter genesis from strongly coupled strings

Search for photon oscillations into massive particles

Kinetic mixing at strong coupling

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