Ghostbusters in f (R) supergravity

Toshiaki Fujimori; Muneto Nitta; Keisuke Ohashi; Yusuke Yamada

doi:10.1007/JHEP05(2018)102

Ghostbusters in f (R) supergravity

Toshiaki Fujimori, Muneto Nitta, Keisuke Ohashi, Yusuke Yamada

Faculty of Business and Commerce

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

f (R) supergravity is known to contain a ghost mode associated with higher-derivative terms if it contains Rⁿ with n greater than two. We remove the ghost in f (R) supergravity by introducing auxiliary gauge field to absorb the ghost. We dub this method as the ghostbuster mechanism [1]. We show that the mechanism removes the ghost super-multiplet but also terms including Rⁿ with n ≥ 3, after integrating out auxiliary degrees of freedom. For pure supergravity case, there appears an instability in the resultant scalar potential. We then show that the instability of the scalar potential can be cured by introducing matter couplings in such a way that the system has a stable potential.

Original language	English
Article number	102
Journal	Journal of High Energy Physics
Volume	2018
Issue number	5
DOIs	https://doi.org/10.1007/JHEP05(2018)102
Publication status	Published - 2018 May 1

Keywords

Supergravity Models
Supersymmetric Effective Theories

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1007/JHEP05(2018)102

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title = "Ghostbusters in f (R) supergravity",

abstract = "f (R) supergravity is known to contain a ghost mode associated with higher-derivative terms if it contains Rn with n greater than two. We remove the ghost in f (R) supergravity by introducing auxiliary gauge field to absorb the ghost. We dub this method as the ghostbuster mechanism [1]. We show that the mechanism removes the ghost super-multiplet but also terms including Rn with n ≥ 3, after integrating out auxiliary degrees of freedom. For pure supergravity case, there appears an instability in the resultant scalar potential. We then show that the instability of the scalar potential can be cured by introducing matter couplings in such a way that the system has a stable potential.",

keywords = "Supergravity Models, Supersymmetric Effective Theories",

author = "Toshiaki Fujimori and Muneto Nitta and Keisuke Ohashi and Yusuke Yamada",

note = "Funding Information: This work is supported by the Ministry of Education, Culture, Sports, Science (MEXT)-Supported Program for the Strategic Research Foundation at Private Universities “Topological Science” (Grant No. S1511006). The work of M. N. is also supported in part by a Grant-in-Aid for Scientific Research on Innovative Areas “Topological Materials Science” (KAKENHI Grant No. 15H05855) from the MEXT of Japan, and by the Japan Society for Funding Information: Open Access, {\textcopyright}c The Authors. Article funded by SCOAP3. Publisher Copyright: {\textcopyright} 2018, The Author(s).",

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doi = "10.1007/JHEP05(2018)102",

language = "English",

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AU - Fujimori, Toshiaki

AU - Nitta, Muneto

AU - Ohashi, Keisuke

AU - Yamada, Yusuke

N1 - Funding Information: This work is supported by the Ministry of Education, Culture, Sports, Science (MEXT)-Supported Program for the Strategic Research Foundation at Private Universities “Topological Science” (Grant No. S1511006). The work of M. N. is also supported in part by a Grant-in-Aid for Scientific Research on Innovative Areas “Topological Materials Science” (KAKENHI Grant No. 15H05855) from the MEXT of Japan, and by the Japan Society for Funding Information: Open Access, ©c The Authors. Article funded by SCOAP3. Publisher Copyright: © 2018, The Author(s).

PY - 2018/5/1

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N2 - f (R) supergravity is known to contain a ghost mode associated with higher-derivative terms if it contains Rn with n greater than two. We remove the ghost in f (R) supergravity by introducing auxiliary gauge field to absorb the ghost. We dub this method as the ghostbuster mechanism [1]. We show that the mechanism removes the ghost super-multiplet but also terms including Rn with n ≥ 3, after integrating out auxiliary degrees of freedom. For pure supergravity case, there appears an instability in the resultant scalar potential. We then show that the instability of the scalar potential can be cured by introducing matter couplings in such a way that the system has a stable potential.

AB - f (R) supergravity is known to contain a ghost mode associated with higher-derivative terms if it contains Rn with n greater than two. We remove the ghost in f (R) supergravity by introducing auxiliary gauge field to absorb the ghost. We dub this method as the ghostbuster mechanism [1]. We show that the mechanism removes the ghost super-multiplet but also terms including Rn with n ≥ 3, after integrating out auxiliary degrees of freedom. For pure supergravity case, there appears an instability in the resultant scalar potential. We then show that the instability of the scalar potential can be cured by introducing matter couplings in such a way that the system has a stable potential.

KW - Supergravity Models

KW - Supersymmetric Effective Theories

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Ghostbusters in f (R) supergravity

Abstract

Keywords

ASJC Scopus subject areas

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