A viable model of dynamical supersymmetry breaking in the hidden sector

Nelson, Ann E.

doi:10.1016/0370-2693(95)01547-7

Cited by 16 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Alternatively, some or all of the moduli might play a role in the hidden sector dynamics. The models of [10] and [11], for example, have classical moduli. These moduli may be stabilized near the origin, i.e., near the enhanced symmetry point.…”

Section: The Problem Of Modulimentioning

confidence: 99%

See 1 more Smart Citation

Enhanced symmetries and the ground state of string theory

1998

View full text Add to dashboard Cite

The ground state of string theory may lie at a point of "maximally enhanced symmetry", at which all of the moduli transform under continuous or discrete symmetries. This hypothesis, along with the hypotheses that the theory at high energies has N = 1 supersymmetry and that the gauge couplings are weak and unified, has definite consequences for low energy physics. We describe these, and offer some suggestions as to how these assumptions might be compatible. 5/98

show abstract

Section: The Problem Of Modulimentioning

confidence: 99%

“…Models such as those of Intriligator and Thomas[10] or Nelson[11] are only natural if the various singlets transform under discrete symmetries.…”

mentioning

confidence: 99%

Enhanced symmetries and the ground state of string theory

1998

View full text Add to dashboard Cite

show abstract

“…The absence of this field in other models in which supersymmetry is also broken in the flat limit leads to very light gauginos [11] (see, however, Ref. [12]). In string theories the operator equation (8) …”

Section: Gia Dvali and Alex Pomarol Theory Division Cern Ch-1211 Gementioning

confidence: 99%

Anomalous U(1) as a Mediator of Supersymmetry Breaking

Dvali¹,

1996

View full text Add to dashboard Cite

We point out that an anomalous gauge U(1) symmetry is a natural candidate for being the mediator and messenger of supersymmetry breaking. It facilitates dynamical supersymmetry breaking even in the flat limit. Soft masses are induced by both gravity and the U(1) gauge interactions giving an unusual mass hierarchy in the sparticle spectrum which suppresses flavor violations. This scenario does not suffer from the Polonyi problem. [S0031-9007(96) PACS numbers: 12.60. Jv, 04.65. + e, 11.30.Na, 14.80.Ly The origin of supersymmetry breaking remains an open question. More important, for phenomenological purposes, it is to know how the breaking of supersymmetry is transmitted to the ordinary particles. The most popular scenario arises in the context of supergravity. In these theories supersymmetry is assumed to be broken in some isolated hidden sector and transmitted to the observable sector by gravity [1]. These models, however, suffer from certain drawbacks. The degeneracy of the scalar quarks needed to avoid large flavor changing neutral currents (FCNC) is not usually guaranteed at low energies. Also the breaking of supersymmetry results in the nonflat limit leading to cosmological disasters (the Polonyi problem [2]).In this Letter we will consider an alternative scenario. It is well known that extra U(1) factors normally appear in effective field theories arising from strings. One of these U(1) is usually anomalous. The cancellation of its anomalies occurs by the Green-Schwarz mechanism [3] and requires that both hidden and observable fields transform nontrivially under this U(1). Thus this anomalous U(1) seems to be a natural new candidate for transmitting the supersymmetry breaking from the hidden to the observable sector. Here we will study this possibility.Since the U(1) is anomalous, Tr Q fi 0, a FayetIliopoulos term of O ͑M 2 P ͒ is always generated [4]. This term facilitates the breaking of supersymmetry in the flat limit, avoiding the Polonyi problem. The scale of supersymmetry breaking can be smaller than M P and can originate dynamically. In the presence of gravity, realistic scalar and gaugino masses are induced in the observable sector. We find that the D-term contribution can be larger than the gravity mediated F-term contribution, resulting in a hierarchy of soft masses. This is a crucial difference with the conventional hidden sector scenarios in supergravity models. As we will show, our model can lead to a certain degree of squark degeneracy and suppressed FCNC. It also allows for an explanation of the observed quark mass hierarchy (m t,b ¿ m u,d , m c,s ) and predicts an inverse hierarchy for the squarks (m

show abstract

Dynamical supersymmetry breaking versus run-away behavior in supersymmetric gauge theories

Shirman

1996

Physics Letters B

View full text Add to dashboard Cite

We consider Dynamical Supersymmetry Breaking (DSB) in models with classical flat directions. We analyze a number of examples, and develop a systematic approach to determine if classical flat directions are stabilized in the full quantum theory, or lead to run-away behavior. In some cases pseudo-flat directions remain even at the quantum level before taking into account corrections to the Kähler potential. We show that in certain limits these corrections are calculable. In particular, we find that in the Intriligator-Thomas SU (2) and its generalizations, a potential for moduli is generated. Moreover, there is a region of the parameter space where Kähler potential corrections lead to calculable (local) minima at large but finite distance from the origin. 8/96 *

show abstract

A viable model of dynamical supersymmetry breaking in the hidden sector

Cited by 16 publications

References 31 publications

Enhanced symmetries and the ground state of string theory

Enhanced symmetries and the ground state of string theory

Anomalous U(1) as a Mediator of Supersymmetry Breaking

Dynamical supersymmetry breaking versus run-away behavior in supersymmetric gauge theories

Contact Info

Product

Resources

About