Beyond ΛCDM: problems, solutions, and the road ahead

Philip Bull; Yashar Akrami; Julian Adamek; Tessa Baker; Emilio Bellini; Jose Beltrán Jiménez; Eloisa Bentivegna; Stefano Camera; Sébastien Clesse; Jonathan H. Davis; Enea Di Dio; Jonas Enander; Alan Heavens; Lavinia Heisenberg; Bin Hu; Claudio Llinares; Roy Maartens; Edvard Mörtsell; Seshadri Nadathur; Johannes Noller; Roman Pasechnik; Marcel S. Pawlowski; Thiago S. Pereira; Miguel Quartin; Angelo Ricciardone; Signe Riemer-Sørensen; Massimiliano Rinaldi; Jeremy Sakstein; Ippocratis D. Saltas; Vincenzo Salzano; Ignacy Sawicki; Adam R. Solomon; Douglas Spolyar; Glenn D. Starkman; Danièle Steer; Ismael Tereno; Licia Verde; Francisco Villaescusa-Navarro; Mikael von Strauss; Hans A. Winther

doi:10.1016/j.dark.2016.02.001

Beyond ΛCDM: problems, solutions, and the road ahead

Philip Bull, Yashar Akrami, Julian Adamek, Tessa Baker, Emilio Bellini, Jose Beltrán Jiménez, Eloisa Bentivegna, Stefano Camera, Sébastien Clesse, Jonathan H. Davis, Enea Di Dio, Jonas Enander, Alan Heavens, Lavinia Heisenberg, Bin Hu, Claudio Llinares, Roy Maartens, Edvard Mörtsell, Seshadri Nadathur, Johannes NollerRoman Pasechnik, Marcel S. Pawlowski, Thiago S. Pereira, Miguel Quartin, Angelo Ricciardone, Signe Riemer-Sørensen, Massimiliano Rinaldi, Jeremy Sakstein, Ippocratis D. Saltas, Vincenzo Salzano, Ignacy Sawicki, Adam R. Solomon, Douglas Spolyar, Glenn D. Starkman, Danièle Steer, Ismael Tereno, Licia Verde, Francisco Villaescusa-Navarro, Mikael von Strauss, Hans A. Winther

Institute of Cosmology & Gravitation

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Abstract

Despite its continued observational successes, there is a persistent (and growing) interest in extending cosmology beyond the standard model, ΛCDM. This is motivated by a range of apparently serious theoretical issues, involving such questions as the cosmological constant problem, the particle nature of dark matter, the validity of general relativity on large scales, the existence of anomalies in the CMB and on small scales, and the predictivity and testability of the inflationary paradigm. In this paper, we summarize the current status of ΛCDM as a physical theory, and review investigations into possible alternatives along a number of different lines, with a particular focus on highlighting the most promising directions. While the fundamental problems are proving reluctant to yield, the study of alternative cosmologies has led to considerable progress, with much more to come if hopes about forthcoming high-precision observations and new theoretical ideas are fulfilled.

Original language	English
Pages (from-to)	56-99
Journal	Physics of the Dark Universe
Volume	12
Early online date	2 Mar 2016
DOIs	https://doi.org/10.1016/j.dark.2016.02.001
Publication status	Published - Jun 2016

Keywords

astro-ph.CO
astro-ph.GA
gr-qc
hep-ph
hep-th
RCUK
STFC
ST/L00075X/1
Cosmology
Dark energy
Cosmological constant problem
Modified gravity
Dark matter
Early universe

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10.1016/j.dark.2016.02.001

Physics of the dark universe post-printAccepted author manuscript (Post-print), 3.72 MBLicence: CC BY-NC-ND

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Testing cosmology with a catalogue of voids in the BOSS galaxy surveys
Nadathur, S., Sept 2016, In: Monthly Notices of the Royal Astronomical Society. 461, 1, p. 358-370 14 p.
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Bull, P., Akrami, Y., Adamek, J., Baker, T., Bellini, E., Jiménez, J. B., Bentivegna, E., Camera, S., Clesse, S., Davis, J. H., Dio, E. D., Enander, J., Heavens, A., Heisenberg, L., Hu, B., Llinares, C., Maartens, R., Mörtsell, E., Nadathur, S., ... Winther, H. A. (2016). Beyond ΛCDM: problems, solutions, and the road ahead. Physics of the Dark Universe, 12, 56-99. https://doi.org/10.1016/j.dark.2016.02.001

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title = "Beyond ΛCDM: problems, solutions, and the road ahead",

abstract = "Despite its continued observational successes, there is a persistent (and growing) interest in extending cosmology beyond the standard model, ΛCDM. This is motivated by a range of apparently serious theoretical issues, involving such questions as the cosmological constant problem, the particle nature of dark matter, the validity of general relativity on large scales, the existence of anomalies in the CMB and on small scales, and the predictivity and testability of the inflationary paradigm. In this paper, we summarize the current status of ΛCDM as a physical theory, and review investigations into possible alternatives along a number of different lines, with a particular focus on highlighting the most promising directions. While the fundamental problems are proving reluctant to yield, the study of alternative cosmologies has led to considerable progress, with much more to come if hopes about forthcoming high-precision observations and new theoretical ideas are fulfilled.",

keywords = "astro-ph.CO, astro-ph.GA, gr-qc, hep-ph, hep-th, RCUK, STFC, ST/L00075X/1, Cosmology, Dark energy, Cosmological constant problem, Modified gravity, Dark matter, Early universe",

author = "Philip Bull and Yashar Akrami and Julian Adamek and Tessa Baker and Emilio Bellini and Jim{\'e}nez, {Jose Beltr{\'a}n} and Eloisa Bentivegna and Stefano Camera and S{\'e}bastien Clesse and Davis, {Jonathan H.} and Dio, {Enea Di} and Jonas Enander and Alan Heavens and Lavinia Heisenberg and Bin Hu and Claudio Llinares and Roy Maartens and Edvard M{\"o}rtsell and Seshadri Nadathur and Johannes Noller and Roman Pasechnik and Pawlowski, {Marcel S.} and Pereira, {Thiago S.} and Miguel Quartin and Angelo Ricciardone and Signe Riemer-S{\o}rensen and Massimiliano Rinaldi and Jeremy Sakstein and Saltas, {Ippocratis D.} and Vincenzo Salzano and Ignacy Sawicki and Solomon, {Adam R.} and Douglas Spolyar and Starkman, {Glenn D.} and Dani{\`e}le Steer and Ismael Tereno and Licia Verde and Francisco Villaescusa-Navarro and Strauss, {Mikael von} and Winther, {Hans A.}",

year = "2016",

month = jun,

doi = "10.1016/j.dark.2016.02.001",

language = "English",

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pages = "56--99",

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Bull, P, Akrami, Y, Adamek, J, Baker, T, Bellini, E, Jiménez, JB, Bentivegna, E, Camera, S, Clesse, S, Davis, JH, Dio, ED, Enander, J, Heavens, A, Heisenberg, L, Hu, B, Llinares, C, Maartens, R, Mörtsell, E, Nadathur, S, Noller, J, Pasechnik, R, Pawlowski, MS, Pereira, TS, Quartin, M, Ricciardone, A, Riemer-Sørensen, S, Rinaldi, M, Sakstein, J, Saltas, ID, Salzano, V, Sawicki, I, Solomon, AR, Spolyar, D, Starkman, GD, Steer, D, Tereno, I, Verde, L, Villaescusa-Navarro, F, Strauss, MV & Winther, HA 2016, 'Beyond ΛCDM: problems, solutions, and the road ahead', Physics of the Dark Universe, vol. 12, pp. 56-99. https://doi.org/10.1016/j.dark.2016.02.001

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T2 - problems, solutions, and the road ahead

AU - Bull, Philip

AU - Akrami, Yashar

AU - Adamek, Julian

AU - Baker, Tessa

AU - Bellini, Emilio

AU - Jiménez, Jose Beltrán

AU - Bentivegna, Eloisa

AU - Camera, Stefano

AU - Clesse, Sébastien

AU - Davis, Jonathan H.

AU - Dio, Enea Di

AU - Enander, Jonas

AU - Heavens, Alan

AU - Heisenberg, Lavinia

AU - Hu, Bin

AU - Llinares, Claudio

AU - Maartens, Roy

AU - Mörtsell, Edvard

AU - Nadathur, Seshadri

AU - Noller, Johannes

AU - Pasechnik, Roman

AU - Pawlowski, Marcel S.

AU - Pereira, Thiago S.

AU - Quartin, Miguel

AU - Ricciardone, Angelo

AU - Riemer-Sørensen, Signe

AU - Rinaldi, Massimiliano

AU - Sakstein, Jeremy

AU - Saltas, Ippocratis D.

AU - Salzano, Vincenzo

AU - Sawicki, Ignacy

AU - Solomon, Adam R.

AU - Spolyar, Douglas

AU - Starkman, Glenn D.

AU - Steer, Danièle

AU - Tereno, Ismael

AU - Verde, Licia

AU - Villaescusa-Navarro, Francisco

AU - Strauss, Mikael von

AU - Winther, Hans A.

PY - 2016/6

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N2 - Despite its continued observational successes, there is a persistent (and growing) interest in extending cosmology beyond the standard model, ΛCDM. This is motivated by a range of apparently serious theoretical issues, involving such questions as the cosmological constant problem, the particle nature of dark matter, the validity of general relativity on large scales, the existence of anomalies in the CMB and on small scales, and the predictivity and testability of the inflationary paradigm. In this paper, we summarize the current status of ΛCDM as a physical theory, and review investigations into possible alternatives along a number of different lines, with a particular focus on highlighting the most promising directions. While the fundamental problems are proving reluctant to yield, the study of alternative cosmologies has led to considerable progress, with much more to come if hopes about forthcoming high-precision observations and new theoretical ideas are fulfilled.

AB - Despite its continued observational successes, there is a persistent (and growing) interest in extending cosmology beyond the standard model, ΛCDM. This is motivated by a range of apparently serious theoretical issues, involving such questions as the cosmological constant problem, the particle nature of dark matter, the validity of general relativity on large scales, the existence of anomalies in the CMB and on small scales, and the predictivity and testability of the inflationary paradigm. In this paper, we summarize the current status of ΛCDM as a physical theory, and review investigations into possible alternatives along a number of different lines, with a particular focus on highlighting the most promising directions. While the fundamental problems are proving reluctant to yield, the study of alternative cosmologies has led to considerable progress, with much more to come if hopes about forthcoming high-precision observations and new theoretical ideas are fulfilled.

KW - astro-ph.CO

KW - astro-ph.GA

KW - gr-qc

KW - hep-ph

KW - hep-th

KW - RCUK

KW - STFC

KW - ST/L00075X/1

KW - Cosmology

KW - Dark energy

KW - Cosmological constant problem

KW - Modified gravity

KW - Dark matter

KW - Early universe

U2 - 10.1016/j.dark.2016.02.001

DO - 10.1016/j.dark.2016.02.001

M3 - Article

VL - 12

SP - 56

EP - 99

JO - Physics of the Dark Universe

JF - Physics of the Dark Universe

ER -

Beyond ΛCDM: problems, solutions, and the road ahead

Abstract

Keywords

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Research output

Testing cosmology with a catalogue of voids in the BOSS galaxy surveys

Cite this