Built on

K. Freese, J. A. Frieman and A. V. Olinto, “Natural inflation with pseudo - Nambu-Goldstone bosons,” Phys. Rev. Lett. 65
1993
Earlier work this paper cites.
C. Vafa, “Evidence for F theory,” Nucl. Phys. B 469
1996
Earlier work this paper cites.
A. H. Guth, “The Inflationary Universe: A Possible Solution To The Horizon And Flatness Problems,” Phys. Rev. D 23
1997
Earlier work this paper cites.
R. C. Myers, “Dielectric branes,” JHEP 9912
Original
1999
Earlier work this paper cites.
S. Kachru, R. Kallosh, A. D. Linde and S. P. Trivedi, “De Sitter vacua in string theory,” Phys. Rev. D 68
2003
Earlier work this paper cites.
T. W. Grimm and J. Louis, “The Effective action of N = 1 Calabi-Yau orientifolds,” Nucl. Phys. B 699
2004
Earlier work this paper cites.
H. Jockers and J. Louis, “The Effective action of D7-branes in N = 1 Calabi-Yau orientifolds,” Nucl. Phys. B 705
2005
Earlier work this paper cites.
M. Haack, D. Krefl, D. Lust, A. Van Proeyen and M. Zagermann, “Gaugino Condensates and D-terms from D7-branes,” JHEP 0701
2006
Earlier work this paper cites.
P. Svrcek and E. Witten, “Axions In String Theory,” JHEP 0606
2006
Earlier work this paper cites.

Similar

E. A. Bergshoeff, M. de Roo, S. F. Kerstan, T. Ortin and F. Riccioni, “SL(2,R)-invariant IIB Brane Actions,” JHEP 0702
2007
Cited alongside, same era.
E. Silverstein and A. Westphal, “Monodromy in the CMB: Gravity Waves and String Inflation,” Phys. Rev. D 78
Original
2008
Cited alongside, same era.
S. Dimopoulos, S. Kachru, J. McGreevy and J. G. Wacker, “N-flation,” JCAP 0808
2008
Cited alongside, same era.
T. W. Grimm, “Axion inflation in type II string theory,” Phys. Rev. D 77
Original
2008
Cited alongside, same era.
R. Blumenhagen, V. Braun, T. W. Grimm and T. Weigand, “GUTs in Type IIB Orientifold Compactifications,” Nucl. Phys. B 815
Original
2009
Cited alongside, same era.

Then

M. Berg, E. Pajer and S. Sjors, “Dante’s Inferno,” Phys. Rev. D 81
Original
2010
Later among the works it cites.
T. W. Grimm, M. Kerstan, E. Palti and T. Weigand, “Massive Abelian Gauge Symmetries and Fluxes in F-theory,” JHEP 1112
Original
2011
Later among the works it cites.
X. Dong, B. Horn, E. Silverstein and A. Westphal, “Simple exercises to flatten your potential,” Phys. Rev. D 84
Original
2011
Later among the works it cites.
T. W. Grimm, M. Kerstan, E. Palti and T. Weigand, “On Fluxed Instantons and Moduli Stabilisation in IIB Orientifolds and F-theory,” Phys. Rev. D 84
Original
2011
Later among the works it cites.
J. P. Conlon, “Brane-Antibrane Backreaction in Axion Monodromy Inflation,” JCAP 1201

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2014

Towards large r from [p,q]-inflation

Palti, Eran, Weigand, Timo

Understand

The recent discovery of B-mode polarizations in the CMB by the BICEP2 collaboration motivates the study of large-field inflation models which can naturally lead to significant tensor-to-scalar ratios.

A class of such models in string theory are axion monodromy models, where the shift symmetry of an axion is broken by some branes.
In type IIB string theory such models so far utilized NS5 branes which lead to a linear potential with an induced tensor-to-scalar ratio of $r \sim 0.07$.
In this short note we study a modification of the scenario to include [p,q] 7-branes and show that this leads to an enhanced tensor-to-scalar ratio $r \sim 0.14$.

Built on

K. Freese, J. A. Frieman and A. V. Olinto, “Natural inflation with pseudo - Nambu-Goldstone bosons,” Phys. Rev. Lett. 65
1993
Earlier work this paper cites.
C. Vafa, “Evidence for F theory,” Nucl. Phys. B 469
1996
Earlier work this paper cites.
A. H. Guth, “The Inflationary Universe: A Possible Solution To The Horizon And Flatness Problems,” Phys. Rev. D 23
1997
Earlier work this paper cites.
R. C. Myers, “Dielectric branes,” JHEP 9912
Original
1999
Earlier work this paper cites.
S. Kachru, R. Kallosh, A. D. Linde and S. P. Trivedi, “De Sitter vacua in string theory,” Phys. Rev. D 68
2003
Earlier work this paper cites.
T. W. Grimm and J. Louis, “The Effective action of N = 1 Calabi-Yau orientifolds,” Nucl. Phys. B 699
2004
Earlier work this paper cites.
H. Jockers and J. Louis, “The Effective action of D7-branes in N = 1 Calabi-Yau orientifolds,” Nucl. Phys. B 705
2005
Earlier work this paper cites.
M. Haack, D. Krefl, D. Lust, A. Van Proeyen and M. Zagermann, “Gaugino Condensates and D-terms from D7-branes,” JHEP 0701
2006
Earlier work this paper cites.
P. Svrcek and E. Witten, “Axions In String Theory,” JHEP 0606
2006
Earlier work this paper cites.