Holomorphic variables in magnetized brane models with continuous Wilson lines

Cámara, Pablo G.; Condeescu, Cezar; Dudas, Emilian

doi:10.1007/jhep04(2010)029

Cited by 14 publications

(23 citation statements)

References 80 publications

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“…Such kind of behavior is well-known in N = 1 string compactifications, where the closed string moduli space is fibered over the open string moduli space, and so performing certain loops on the D-brane moduli space is equivalent to shift the values of the closed string variables [47][48][49][50][51]. In the case at hand, performing loops is equivalent to redefine our U(1) sector.…”

Section: Jhep09(2011)110mentioning

confidence: 99%

RR photons

Cámara

Ibáñez

Marchesano

2011

J. High Energ. Phys.

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163

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Type II string compactifications to 4d generically contain massless RamondRamond U(1) gauge symmetries. However there is no massless matter charged under these U(1)'s, which makes a priori difficult to measure any physical consequences of their existence. There is however a window of opportunity if these RR U(1)'s mix with the hypercharge U(1) Y (hence with the photon). In this paper we study in detail different avenues by which U(1) RR bosons may mix with D-brane U(1)'s. We concentrate on Type IIA orientifolds and their M-theory lift, and provide geometric criteria for the existence of such mixing, which may occur either via standard kinetic mixing or via the mass terms induced by Stückelberg couplings. The latter case is particularly interesting, and appears whenever D-branes wrap torsional p-cycles in the compactification manifold. We also show that in the presence of torsional cycles discrete gauge symmetries and Aharanov-Bohm strings and particles appear in the 4d effective action, and that type IIA Stückelberg couplings can be understood in terms of torsional (co)homology in M-theory. We provide examples of Type IIA Calabi-Yau orientifolds in which the required torsional cycles exist and kinetic mixing induced by mass mixing is present. We discuss some phenomenological consequences of our findings. In particular, we find that mass mixing may induce corrections relevant for hypercharge gauge coupling unification in F-theory SU(5) GUT's.

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Section: Jhep09(2011)110mentioning

confidence: 99%

RR photons

Cámara

Ibáñez

Marchesano

2011

J. High Energ. Phys.

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163

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“…A systematic study of field redefinitions in the context of toroidal type IIB (orientifold) compactifications with magnetized D-branes and continuous Wilson lines was performed in [28]. We reproduce here the main results of this paper, which will be relevant for later computations.…”

Section: Holomorphic Fields In Magnetized Type I Strings With Wilson mentioning

confidence: 79%

“…|I r IJ | − 1. The N = 1 holomorphic variables which appear in the superpotential related to these fields can be extracted from the expression of the Yukawa couplings, resulting in [28] …”

Section: Jhep06(2010)062mentioning

confidence: 99%

“…[29][30][31][32] for early examples) absorbing non-holomorphic terms in their definition. Redefinitions of the complex axion-dilaton S and the Kähler moduli T k can be deduced by looking at nonperturbative couplings generated by E5 and E1-brane instantons [28]. For factorizable 6-tori, these turn out to be given by,…”

Section: Jhep06(2010)062mentioning

confidence: 99%

“…The one-loop contribution to the holomorphic superpotential computed from this expression then reads [28] …”

Section: Jhep06(2010)062mentioning

confidence: 99%

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Non-perturbative vacuum destabilization and D-brane dynamics

Cámara

Condeescu

Dudas

et al. 2010

J. High Energ. Phys.

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Abstract:We analyze the process of string vacuum destabilization due to instanton induced superpotential couplings which depend linearly on charged fields. These nonperturbative instabilities result in potentials for the D-brane moduli and lead to processes of D-brane recombination, motion and partial moduli stabilization at the non-perturbative vacuum. By using techniques of D-brane instanton calculus, we explicitly compute this scalar potential in toroidal orbifold compactifications with magnetized D-branes by summing over the possible discrete instanton configurations. We illustrate explicitly the resulting dynamics in globally consistent models. These instabilities can have phenomenological applications to breaking hidden sector gauge groups, open string moduli stabilization and supersymmetry breaking. Our results suggest that breaking supersymmetry by Polonyi-like models in string theory is more difficult than expected.

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