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1. Simplified models for dark matter searches at the LHC

Author

Abdallah, J, Araujo, H, Arbey, A, Ashkenazi, A, Belyaev, A, Berger, J, Boehm, C, Boveia, A, Brennan, A, Brooke, J, Buchmueller, O, Buckley, M, Busoni, G, Calibbi, L, Chauhan, S, Daci, N, Davies, G, De Bruyn, I, De Jong, P, De Roeck, A, de Vries, K, Del Re, D, De Simone, A, Di Simone, A, Doglioni, C, Dolan, M, Dreiner, HK, Ellis, J, Eno, S, Etzion, E, Fairbairn, M, Feldstein, B, Flaecher, H, Feng, E, Fox, P, Genest, MH, Gouskos, L, Gramling, J, Haisch, U, Harnik, R, Hibbs, A, Hoh, S, Hopkins, W, Ippolito, V, Jacques, T, Kahlhoefer, F, Khoze, VV, Kirk, R, Korn, A, Kotov, K, Kunori, S, Landsberg, G, Liem, S, Lin, T, Lowette, S, Lucas, R, Malgeri, L, Malik, S, McCabe, C, Mete, AS, Morgante, E, Mrenna, S, Nakahama, Y, Newbold, D, Nordstrom, K, Pani, P, Papucci, M, Pataraia, S, Penning, B, Pinna, D, Polesello, G, Racco, D, Re, E, Riotto, AW, Rizzo, T, Salek, D, Sarkar, S, Schramm, S, Skubic, P, Slone, O, Smirnov, J, Soreq, Y, Sumner, T, Tait, TMP, Thomas, M, Tomalin, I, Tunnell, C, Vichi, A, Volansky, T, Weiner, N, West, SM, Wielers, M, Worm, S, Yavin, I, Zaldivar, B, Zhou, N, and Zurek, K

Subjects
Dark matter, Direct detection, Collider search for dark matter, Simplified models, Effective field theory, hep-ph, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract

This document a59Summary of the discussions and conclusions following from Dark Matter @ LHC 2014, held at Merton College, Oxford, on September 25-27, 2014. outlines a set of simplified models for dark matter and its interactions with Standard Model particles. It is intended to summarize the main characteristics that these simplified models have when applied to dark matter searches at the LHC, and to provide a number of useful expressions for reference. The list of models includes both s-channel and t-channel scenarios. For s-channel, spin-0 and spin-1 mediations are discussed, and also realizations where the Higgs particle provides a portal between the dark and visible sectors. The guiding principles underpinning the proposed simplified models are spelled out, and some suggestions for implementation are presented.

Published
2015

2. Simplified models for LHC new physics searches

Author

Alves, D, Arkani-Hamed, N, Arora, S, Bai, Y, Baumgart, M, Berger, J, Buckley, M, Butler, B, Chang, S, Cheng, HC, Cheung, C, Chivukula, RS, Cho, WS, Cotta, R, Dalfonso, M, Hedri, SE, Essig, R, Evans, JA, Fitzpatrick, L, Fox, P, Franceschini, R, Freitas, A, Gainer, JS, Gershtein, Y, Gray, R, Gregoire, T, Gripaios, B, Gunion, J, Han, T, Haas, A, Hansson, P, Hewett, J, Hits, D, Hubisz, J, Izaguirre, E, Kaplan, J, Katz, E, Kilic, C, Kim, HD, Kitano, R, Koay, SA, Ko, P, Krohn, D, Kuflik, E, Lewis, I, Lisanti, M, Liu, T, Liu, Z, Lu, R, Luty, M, Meade, P, Morrissey, D, Mrenna, S, Nojiri, M, Okui, T, Padhi, S, Papucci, M, Park, M, Perelstein, M, Peskin, M, Phalen, D, Rehermann, K, Rentala, V, Roy, T, Ruderman, JT, Sanz, V, Schmaltz, M, Schnetzer, S, Schuster, P, Schwaller, P, Schwartz, MD, Schwartzman, A, Shao, J, Shelton, J, Shih, D, Shu, J, Silverstein, D, Simmons, E, Somalwar, S, Spannowsky, M, Spethmann, C, Strassler, M, Su, S, Tait, T, Thomas, B, Thomas, S, Toro, N, Volansky, T, Wacker, J, Waltenberger, W, Yavin, I, Yu, F, Zhao, Y, and Zurek, K

Subjects
hep-ph, hep-ex, Nuclear & Particles Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract

This document proposes a collection of simplified models relevant to the design of new-physics searches at the Large Hadron Collider (LHC) and the characterization of their results. Both ATLAS and CMS have already presented some results in terms of simplified models, and we encourage them to continue and expand this effort, which supplements both signature-based results and benchmark model interpretations. A simplified model is defined by an effective Lagrangian describing the interactions of a small number of new particles. Simplified models can equally well be described by a small number of masses and cross-sections. These parameters are directly related to collider physics observables, making simplified models a particularly effective framework for evaluating searches and a useful starting point for characterizing positive signals of new physics. This document serves as an official summary of the results from the Topologies for Early LHC Searches workshop, held at SLAC in September of 2010, the purpose of which was to develop a set of representative models that can be used to cover all relevant phase space in experimental searches. Particular emphasis is placed on searches relevant for the first 50-500 pb 1 of data and those motivated by supersymmetric models. This note largely summarizes material posted at http://lhcnewphysics.org/, which includes simplified model definitions, Monte Carlo material, and supporting contacts within the theory community. We also comment on future developments that may be useful as more data is gathered and analyzed by the experiments. © 2012 IOP Publishing Ltd.

Published
2012

3. Simplified Models for LHC New Physics Searches

Author

Emanuel Katz, Wolfgang Waltenberger, Michele Papucci, Scott Thomas, P. Hansson, JoAnne L. Hewett, David Shih, Joshua Berger, Philip Schuster, Tuhin S. Roy, Liam Fitzpatrick, Jessie Shelton, Martin Schmaltz, Keith Rehermann, Matthew Baumgart, Daniele S. M. Alves, Michael Spannowsky, Jing Shu, Sonia El Hedri, Ayres Freitas, Matthew D. Schwartz, Andy Haas, S. Schnetzer, Hsin-Chia Cheng, Myeonghun Park, Daniel Silverstein, Eric Kuflik, Pedro Schwaller, Spencer Chang, J.F. Gunion, Jing Shao, Kathryn M. Zurek, Jared Kaplan, Michael Park, Stephen Mrenna, David E. Morrissey, Matthew J. Strassler, Thomas Gregoire, Tim M. P. Tait, Ian M. Lewis, Veronica Sanz, Mihoko M. Nojiri, S. Arora, Itay Yavin, Matthew R. Buckley, Sunil Somalwar, Clifford Cheung, Pyungwon Ko, Ran Lu, Brooks Thomas, Patrick J. Fox, Joshua T. Ruderman, Sue Ann Koay, Ryuichiro Kitano, Tao Liu, Mariarosaria D'Alfonso, Yue Zhao, Jay G. Wacker, Nima Arkani-Hamed, Tomer Volansky, Ben Gripaios, Michael E. Peskin, Bart Butler, R. Cotta, Won Sang Cho, Ariel Schwartzman, Vikram Rentala, Hyung Do Kim, Natalia Toro, Sanjay Padhi, Mariangela Lisanti, Jay Hubisz, Dmitry Hits, Zhen Liu, Eder Izaguirre, Patrick Meade, Can Kilic, Maxim Perelstein, Rouven Essig, Jared A. Evans, Elizabeth H. Simmons, Shufang Su, James S. Gainer, Markus A. Luty, Felix Yu, Christian Spethmann, R. Sekhar Chivukula, Takemichi Okui, Roberto Franceschini, Yang Bai, David Krohn, R. N.C. Gray, Tao Han, Daniel J. Phalen, Yuri Gershtein, Alves, D., Arkani Hamed, Arora, S., Bai, Y., Baumgart, M., Berger, J., Buckley, M., Butler, B., Chang, S., Cheng, H. C., Cheung, C., Chivukula, R. S., Cho, W. S., Cotta, R., Dalfonso, M., Hedri, S. E., Essig, R., Evans, J., . A., Fitzpatrick, L., Fox, P., Franceschini, Roberto, Freitas, A., Gainer, J. S., Gershtein, Y., Gray, H., Gregoire, T., Gripaios, B., Gunion, J., Han, T., Haas, A., Hansson, P., Hewett, J., Hits, D., Hubisz, J., Izaguirre, E., Kaplan, D., Katz, E., Kilic, C., Kim, H. D., Kitano, R., Koay, S. A., Ko, P., Krohn, D., Kuflik, E., Lewis, I., Lisanti, M., Liu, T., Liu, Z., Lu, R., Luty, M., Meade, P., Morrissey, D., Mrenna, S., Nojiri, M., Okui, T., Padhi, S., Papucci, M., Park, M., Perelstein, M., Peskin, M., Phalen, D., Rehermann, K., Rentala, V., Roy, T., Ruderman, J. T., Sanz, V., Schmaltz, M., Schnetzer, S., Schuster, P., Schwaller, P., Schwartz, M. D., Schwartzman, A., Shao, J., Shelton, D., Shih, D., Shu, J., Silverstein, D., Simmons, E., Somalwar, S., Spannowsky, M., Spethmann, C., Strassler, M., Su, S., Tait, T., Thomas, B., Thomas, S., Toro, N., Volansky, T., Wacker, J., Waltenberger, W., Yavin, I., Yu, F., Zhao, Y., and Zurek, K.

Subjects
Nuclear and High Energy Physics, Particle physics, Collider physics, Physics beyond the Standard Model, Monte Carlo method, FOS: Physical sciences, Network topology, Atomic, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Particle and Plasma Physics, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Nuclear, 010306 general physics, Particle Physics - Phenomenology, Physics, Information retrieval, Large Hadron Collider, hep-ex, 010308 nuclear & particles physics, Small number, Molecular, hep-ph, Observable, Nuclear & Particles Physics, 3. Good health, High Energy Physics - Phenomenology, Phase space
Abstract

This document proposes a collection of simplified models relevant to the design of new-physics searches at the LHC and the characterization of their results. Both ATLAS and CMS have already presented some results in terms of simplified models, and we encourage them to continue and expand this effort, which supplements both signature-based results and benchmark model interpretations. A simplified model is defined by an effective Lagrangian describing the interactions of a small number of new particles. Simplified models can equally well be described by a small number of masses and cross-sections. These parameters are directly related to collider physics observables, making simplified models a particularly effective framework for evaluating searches and a useful starting point for characterizing positive signals of new physics. This document serves as an official summary of the results from the "Topologies for Early LHC Searches" workshop, held at SLAC in September of 2010, the purpose of which was to develop a set of representative models that can be used to cover all relevant phase space in experimental searches. Particular emphasis is placed on searches relevant for the first ~50-500 pb-1 of data and those motivated by supersymmetric models. This note largely summarizes material posted at http://lhcnewphysics.org/, which includes simplified model definitions, Monte Carlo material, and supporting contacts within the theory community. We also comment on future developments that may be useful as more data is gathered and analyzed by the experiments., 40 pages, 2 figures. This document is the official summary of results from "Topologies for Early LHC Searches" workshop (SLAC, September 2010). Supplementary material can be found at http://lhcnewphysics.org

Published
2011

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