Search for Low-Mass Weakly Interacting Massive Particles with SuperCDMS

Agnese, R.; Anderson, A. J.; Asai, M.; Balakishiyeva, D.; Thakur, R. Basu; Bauer, D. A.; Beaty, J.; Billard, J.; Borgland, A. W.; Bowles, M. A.; Brandt, D.; Brink, P. L.; Bunker, R.; Cabrera, B.; Caldwell, D. O.; Cerdeño, D. G.; Chagani, H.; Chen, Y.; Cherry, M.; Cooley, J.; Cornell, B.; Crewdson, C. H.; Cushman, P.; Daal, M.; Devaney, D.; Stefano, P. C. F. Di; Silva, E. Do Couto E; Doughty, T.; Esteban, Luis; Fallows, S.; Figueroa‐Feliciano, E.; Godfrey, G.; Golwala, S. R.; Hall, J.; Hansen, Steen H.; Harris, H. R.; Hertel, S. A.; Hines, B. A.; Höfer, T.; Holmgren, D.; Hsu, L.; Huber, M. E.; Jastram, A.; Kamaev, O.; Kara, Burhan; Kelsey, M.; Kenany, S. Al; Kennedy, A.; Kiveni, M.; Koch, K.; Leder, A.; Loer, B.; Asamar, E. Lopez; Mahapatra, R.; Mandic, V.; Martínez, C. Moreno; McCarthy, K. A.; Mirabolfathi, N.; Moffatt, R. A.; Nelson, Robert H.; Novák, L.; Page, K.; Partridge, R.; Pepin, M.; Phipps, A.; Platt, Mark; Prasad, K.; Pyle, M.; Qiu, H.; Rau, W.; Redl, P.; Reisetter, A.; Resch, R.; Ricci, Y.; Ruschman, M.; Saab, T.; Sadoulet, B.; Sander, J.; Schmitt, R.; Schneck, K.; Schnee, R. W.; Scorza, S.; Seitz, D. N.; Serfass, B.; Shank, B.; Speller, D.; Tomada, A.; Upadhyayula, S.; Villano, A. N.; Welliver, B.; Wright, D. H.; Yellin, S.; Yen, J. J.; Young, B. A.; Zhang, J.

doi:10.1103/physrevlett.112.241302

Cited by 491 publications

(501 citation statements)

References 35 publications

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“…The hashed bands indicate the uncertainty resulting from varying the form factor f N by its uncertainty. Excluded and allowed regions from direct detection experiments at the confidence levels indicated are also shown [119][120][121][122][123][124][125][126][127]. These are spin-independent results obtained directly from searches for nuclei recoils from elastic scattering of WIMPs, rather than being inferred indirectly through Higgs boson exchange in the Higgs portal model.…”

Section: Discussionmentioning

confidence: 99%

“…The hashed bands indicate the uncertainty resulting from the systematic variation of the form factor f N . They are compared with limits from direct searches for dark matter [119][120][121][122][123][124][125][126][127] at the confidence levels indicated. The ATLAS limits on the WIMP-nucleon scattering cross section are proportional to those on the invisible decay branching ratio, as evident from eqs.…”

Section: Jhep11(2015)206mentioning

confidence: 99%

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Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector

Aad

Bergeås

Brenner

et al. 2015

J. High Energ. Phys.

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194

198

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Abstract:The ATLAS experiment at the LHC has measured the Higgs boson couplings and mass, and searched for invisible Higgs boson decays, using multiple production and decay channels with up to 4.7 fb −1 of pp collision data at √ s = 7 TeV and 20.3 fb −1 at √ s = 8 TeV. In the current study, the measured production and decay rates of the observed Higgs boson in the γγ, ZZ, W W , Zγ, bb, τ τ , and µµ decay channels, along with results from the associated production of a Higgs boson with a top-quark pair, are used to probe the scaling of the couplings with mass. Limits are set on parameters in extensions of the Standard Model including a composite Higgs boson, an additional electroweak singlet, and two-Higgs-doublet models. Together with the measured mass of the scalar Higgs boson in the γγ and ZZ decay modes, a lower limit is set on the pseudoscalar Higgs boson mass of m A > 370 GeV in the "hMSSM" simplified Minimal Supersymmetric Standard Model. Results from direct searches for heavy Higgs bosons are also interpreted in the hMSSM. Direct searches for invisible Higgs boson decays in the vector-boson fusion and associated production of a Higgs boson with W/Z (Z → , W/Z → jj) modes are statistically combined to set an upper limit on the Higgs boson invisible branching ratio of 0.25. The use of the measured visible decay rates in a more general coupling fit improves the upper limit to 0.23, constraining a Higgs portal model of dark matter. Conclusions 26The ATLAS collaboration 36 IntroductionThe ATLAS and CMS Collaborations at the Large Hadron Collider (LHC) announced the discovery of a particle consistent with a Higgs boson in 2012 [1,2]. Since then, the collaborations have together measured the mass of the particle to be about 125 GeV [3][4][5]. Studies of its spin and parity in bosonic decays have found it to be compatible with a J P = 0 + state [6][7][8]. Combined coupling fits of the measured Higgs boson production and decay rates within the framework of the Standard Model (SM) have found no significant deviation from the SM expectations [4,9, 10]. These results strongly suggest that the newly discovered particle is indeed a Higgs boson and that a non-zero vacuum expectation value of a Higgs doublet is responsible for electroweak (EW) symmetry breaking [11][12][13].The observed CP-even Higgs boson is denoted as h throughout this paper. A crucial question is whether there is only one Higgs doublet, as postulated by the SM, or whether the Higgs sector is more complex, for example with a second doublet leading to more than one Higgs boson of which one has properties similar to those of the SM Higgs -1 - JHEP11(2015)206boson, as predicted in many theories beyond the Standard Model (BSM). 1 The "hierarchy problem" regarding the naturalness of the Higgs boson mass, the nature of dark matter, and other open questions that the SM is not able to answer also motivate the search for additional new particles and interactions. Astrophysical observations provide strong evidence of dark matter that could be explained by the e...

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Section: Discussionmentioning

confidence: 99%

Section: Jhep11(2015)206mentioning

confidence: 99%

Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector

Aad

Bergeås

Brenner

et al. 2015

J. High Energ. Phys.

Self Cite

194

198

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“…Here we include DAMA modulation amplitude from [57] and the 3 CDMS-Si events [58], along with constraints from LUX [10] and SuperCDMS [59].…”

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confidence: 99%

Direct Detection Phenomenology in Models Where the Products of Dark Matter Annihilation Interact with Nuclei

2015

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We investigate the direct detection phenomenology of a class of dark matter (DM) models in which DM does not directly interact with nuclei, but rather the products of its annihilation do. When these annihilation products are very light compared to the DM mass, the scattering in direct detection experiments is controlled by relativistic kinematics. This results in a distinctive recoil spectrum, a non-standard and or even absent annual modulation, and the ability to probe DM masses as low as a ∼10 MeV. We use current LUX data to show that experimental sensitivity to thermal relic annihilation cross sections has already been reached in a class of models. Moreover, the compatibility of dark matter direct detection experiments can be compared directly in Emin space without making assumptions about DM astrophysics, mass, or scattering form factors. Lastly, when DM has direct couplings to nuclei, the limit from annihilation to relativistic particles in the Sun can be stronger than that of conventional non-relativistic direct detection by more than three orders of magnitude for masses in a 2-7 GeV window.Introduction -While very little is known about Dark Matter (DM), its cosmological abundance is experimentally quite well-determined: Ω CDM h 2 = 0.1199 ± 0.0027 [1]. An appealing framework for understanding the relic abundance of Dark Matter (DM) is thermal freeze-out [2]. Number-changing interactions in the early universe, XX ↔ (SM)SM keep DM in thermal equilibrium with the SM bath, until the rate of these annihilation processes drops below the rate of Hubble expansion. After this point the abundance of DM is essentially fixed at, Ω CDM h 2 0.12 6 × 10 −26 cm 3 s −1 / σ ann v rel , singling out a characteristic annihilation cross section σ ann v rel for thermally produced DM to yield the observed abundance. This scenario is attractive in that it provides a simple and elegant framework for the relic abundance that can be tested in a variety of ways, including direct detection (DD) [3]. However, current constraints from DD rule out many of the simplest models of thermal relic DM, which may indicate a modification of the above picture.In this paper we investigate a modification of thermal DM which alleviates the tension between DD constraints and the thermal relic hypothesis, while making unique predictions for DD. In particular, we take the abundance of DM, X, to be determined by the annihilation process XX ↔ Y Y , where Y is a much lighter dark sector species. The interactions of the dark sector state Y with ordinary nuclei allows for a unique test of the scenario at DD experiments. The resulting DD phenomenology of this class of models is distinctive, owing to the fact that (1) the scattering partner of the nucleus is relativistic, rendering the kinematics of scattering completely different and (2) it is the flux of the scattering partner Y that determines the rate of events at a detector rather than X. Both of these features have novel consequences not considered in the literature of "model-independent" direct detecti...

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“…Current direct detection experiments have reached the sensitivity to probe a broad spectrum of possible dark matter-nucleon interactions, including those depending on the dark matter-nucleus relative velocity and the momentum transfer [5]. LUX, SuperCDMS and CDMSlite are currently setting the most stringent bounds on the velocity and momentum independent dark matter coupling to the Xenon and Germanium nuclear charge density operators [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Prospects for direct detection of dark matter in an effective theory approach

Catena¹

2014

J. Cosmol. Astropart. Phys.

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We perform the first comprehensive analysis of the prospects for direct detection of dark matter with future ton-scale detectors in the general 11-dimensional effective theory of isoscalar dark matter-nucleon interactions mediated by a heavy spin-1 or spin-0 particle. The theory includes 8 momentum and velocity dependent dark matter-nucleon interaction operators, besides the familiar spin-independent and spin-dependent operators. From a variegated sample of 27 benchmark points selected in the parameter space of the theory, we simulate independent sets of synthetic data for ton-scale Germanium and Xenon detectors. From the synthetic data, we then extract the marginal posterior probability density functions and the profile likelihoods of the model parameters. The associated Bayesian credible regions and frequentist confidence intervals allow us to assess the prospects for direct detection of dark matter at the 27 benchmark points. First, we analyze the data assuming the knowledge of the correct dark matter nucleon-interaction type, as it is commonly done for the familiar spin-independent and spin-dependent interactions. Then, we analyze the simulations extracting the dark matter-nucleon interaction type from the data directly, in contrast to standard analyses. This second approach requires an extensive exploration of the full 11-dimensional parameter space of the dark matter-nucleon effective theory. Interestingly, we identify 5 scenarios where the dark matter mass and the dark matter-nucleon interaction type can be reconstructed from the data simultaneously. We stress the importance of extracting the dark matter nucleon-interaction type from the data directly, discussing the main challenges found addressing this complex 11-dimensional problem.

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Search for Low-Mass Weakly Interacting Massive Particles with SuperCDMS

Cited by 491 publications

References 35 publications

Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector

Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector

Direct Detection Phenomenology in Models Where the Products of Dark Matter Annihilation Interact with Nuclei

Prospects for direct detection of dark matter in an effective theory approach

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