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Heavy dark matter through the Higgs portal

Journal of High Energy Physics 2008:7 (2008)

Authors:

J March-Russell, SM West, D Cumberbatch, D Hooper

Abstract:

Motivated by Higgs Portal and Hidden Valley models, heavy particle dark matter that communicates with the supersymmetric Standard Model via pure Higgs sector interactions is considered. We show that a thermal relic abundance consistent with the measured density of dark matter is possible for masses up to ∼ 30TeV. For dark matter masses above ∼ 1TeV, non-perturbative Sommerfeld corrections to the annihilation rate are large, and have the potential to greatly affect indirect detection signals. For large dark matter masses, the Higgs-dark-matter-sector couplings are large and we show how such models may be given a UV completion within the context of so-called ''Fat-Higgs" models. Higgs Portal dark matter provides an example of an attractive alternative to conventional MSSM neutralino dark matter that may evade discovery at the LHC, while still being within the reach of current and upcoming indirect detection experiments.
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Study of the Decays D0→π-e+νe, D0→K-e+νe, D+→π0e+νe, and D+→K̄0e+νe

Physical Review Letters 100:25 (2008)

Authors:

D Cronin-Hennessy, KY Gao, DT Gong, J Hietala, Y Kubota, T Klein, BW Lang, R Poling, AW Scott, A Smith, P Zweber, S Dobbs, Z Metreveli, KK Seth, A Tomaradze, J Ernst, H Severini, SA Dytman, W Love, V Savinov, O Aquines, Z Li, A Lopez, S Mehrabyan, H Mendez, J Ramirez, GS Huang, DH Miller, V Pavlunin, B Sanghi, IPJ Shipsey, B Xin, GS Adams, M Anderson, JP Cummings, I Danko, J Napolitano, Q He, J Insler, H Muramatsu, CS Park, EH Thorndike, F Yang, TE Coan, YS Gao, F Liu, M Artuso, S Blusk, J Butt, J Li, N Menaa, R Mountain, S Nisar, K Randrianarivony, R Redjimi, R Sia, T Skwarnicki, S Stone, JC Wang, K Zhang, SE Csorna, G Bonvicini, D Cinabro, M Dubrovin, A Lincoln, DM Asner, KW Edwards, RA Briere, I Brock, J Chen, T Ferguson, G Tatishvili, H Vogel, ME Watkins, JL Rosner, NE Adam, JP Alexander, K Berkelman, DG Cassel, JE Duboscq, KM Ecklund, R Ehrlich, L Fields, L Gibbons, R Gray, SW Gray, DL Hartill, BK Heltsley, D Hertz, CD Jones, J Kandaswamy, DL Kreinick, VE Kuznetsov, H Mahlke-Krüger, PUE Onyisi, JR Patterson, D Peterson, J Pivarski, D Riley, A Ryd

Abstract:

By using 1.8×106 DD̄ pairs, we have measured B(D0→π-e+νe)=0.299(11)(9)%, B(D+→π0e+νe)=0.373(22)(13)%, B(D0→K-e+νe)=3.56(3)(9)%, and B(D+→K̄0e+νe)=8.53(13)(23)% and have studied the q2 dependence of the form factors. By combining our results with recent lattice calculations, we obtain |Vcd|=0.217(9)(4)(23) and |Vcs|=1.015(10)(11)(106). © 2008 The American Physical Society.
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Study of the semileptonic charm decays D0→π-e+νe, D+→π0e+νe, D0→K-e+νe, and D+→K̄0e+νe

Physical Review D - Particles, Fields, Gravitation and Cosmology 77:11 (2008)

Authors:

S Dobbs, Z Metreveli, KK Seth, A Tomaradze, J Ernst, H Severini, SA Dytman, W Love, V Savinov, O Aquines, Z Li, A Lopez, S Mehrabyan, H Mendez, J Ramirez, GS Huang, DH Miller, V Pavlunin, B Sanghi, IPJ Shipsey, B Xin, GS Adams, M Anderson, JP Cummings, I Danko, J Napolitano, Q He, J Insler, H Muramatsu, CS Park, EH Thorndike, F Yang, TE Coan, YS Gao, F Liu, M Artuso, S Blusk, J Butt, J Li, N Menaa, R Mountain, S Nisar, K Randrianarivony, R Redjimi, R Sia, T Skwarnicki, S Stone, JC Wang, K Zhang, SE Csorna, G Bonvicini, D Cinabro, M Dubrovin, A Lincoln, DM Asner, KW Edwards, RA Briere, I Brock, J Chen, T Ferguson, G Tatishvili, H Vogel, ME Watkins, JL Rosner, NE Adam, JP Alexander, K Berkelman, DG Cassel, JE Duboscq, KM Ecklund, R Ehrlich, L Fields, L Gibbons, R Gray, SW Gray, DL Hartill, BK Heltsley, D Hertz, CD Jones, J Kandaswamy, DL Kreinick, VE Kuznetsov, H Mahlke-Krüger, PUE Onyisi, JR Patterson, D Peterson, J Pivarski, D Riley, A Ryd, AJ Sadoff, H Schwarthoff, X Shi, S Stroiney, WM Sun, T Wilksen, M Weinberger, SB Athar, R Patel, V Potlia, J Yelton

Abstract:

Using a sample of 1.8 million DD̄ mesons collected at the ψ(3770) with the CLEO-c detector, we study the semileptonic decays D0→π-e+νe, D+→π0e+νe, D0→K-e+νe, and D+→K̄0e+νe. For the total branching fractions we find B(D0→π-e+νe)=0.299(11)(9)%, B(D+→π0e+νe)=0.373(22)(13)%, B(D0→K-e+νe)=3.56(3)(9)%, and B(D+→K̄0e+νe)=8.53(13)(23)%, where the first error is statistical and the second systematic. In addition, form factors are studied through fits to the partial branching fractions obtained in five q2 ranges. By combining our results with recent unquenched lattice calculations, we obtain |Vcd|=0.217(9)(4)(23) and |Vcs|=1.015(10)(11)(106), where the final error is theoretical. © 2008 The American Physical Society.
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The LHC Upgrade

Office of Scientific and Technical Information (OSTI) (2008)
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Forward-Backward Asymmetry in Top Quark Production in ppbar Collisions at sqrt{s}=1.96 TeV

ArXiv 0806.2472 (2008)

Authors:

CDF Collaboration, T Aaltonen
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