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Higgs boson searches at the Tevatron |
Gavin J. Davies, on behalf of the CDF and D0 Collaborations( ) |
Imperial College London, London SW7 2AZ, United Kingdom |
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Abstract This article reviews the Higgs searches at the Tevatron, as presented over the summer of 2012; both standard model (SM) and beyond the standard model (BSM) results are discussed as detailed (arXiv: 1207.0449; Phys. Rev. Lett., 2012, 109: 071804; Phys. Rev. D, 2012, 85: 032005).We discuss the combination of searches by the CDF and D0 Collaborations for the standard model Higgs boson in the mass range 100-200 GeV/c2 produced in the the gg→H, WH, ZH, tt ˉH, and vector boson fusion production modes, and decaying in the H→bb ˉ, H→W + W-, H→ZZ, H→τ+τ-, and H→γγ modes. The data, collected at the Fermilab Tevatron collider inpp ˉ collisions at s = 1.96 TeV, correspond to integrated luminosities of up to 10 fb-1. In the absence of signal, we expect to exclude the regions 100<mH<120 GeV/c2 and 139<mH<184 GeV/c2. We exclude, at the 95% C.L., two regions: 100<mH<103 GeV/c2, and 147<mH<180 GeV/c2. We observe a signi.cant excess of events in the mass range between 115 and 140 GeV/c2. The local signi.cance corresponds to 3.0 standard deviations at mH =120 GeV/c2; the global signi.cance (incorporating the lookelsewhere e.ect) for such an excess anywhere in the full mass range investigated is approximately 2.5 standard deviations. Furthermore, we separately combine searches for H→bb ˉ, H→W + W-and H→γγ. We find that the excess is concentrated in the H→bbˉ channel, appearing in the searches over a broad range of mH; the maximum local significance of 3.3 standard deviations corresponds to a global significance of approximately 3.1 standard deviations. The observed signal strengths in all channels are consistent with the expectation for a standard model Higgs boson at mH = 125 GeV/c2. The production of neutral Higgs bosons in association with b-quarks can be significantly enhanced in various beyond the standard model scenarios, including Supersymmetry. The recent combination of such searches from the two collaborations is discussed.
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Keywords
Higgs
Tevatron
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Corresponding Author(s):
Davies, on behalf of the CDF and D0 Collaborations Gavin J.,Email:g.j.davies@imperial.ac.uk
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Issue Date: 01 June 2013
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|
1 |
T. Aaltonen, . [CDF and D0 Collaborations], arXiv: 1207.0449 , 2012
|
2 |
T. Aaltonen, . [CDF and D0 Collaborations], Phys. Rev. Lett. , 2012, 109: 071804 doi: 10.1103/PhysRevLett.109.071804
|
3 |
T. Aaltonen, . [CDF and D0 Collaborations], Phys. Rev. D , 2012, 85: 032005 doi: 10.1103/PhysRevD.85.032005
|
4 |
S. L. Glashow, Nucl. Phys. , 1961, 22(4): 579 doi: 10.1016/0029-5582(61)90469-2
|
5 |
S. Weinberg, Phys. Rev. Lett. , 1967, 19(21): 1264 doi: 10.1103/PhysRevLett.19.1264
|
6 |
A. Salam, Elementary Particle Theory, edited by N. Svartholm, Stockholm: Almqvist & Wiksell, 1968: 367
|
7 |
F. Englert and R. Brout, Phys. Rev. Lett. , 1964, 13(9): 321 doi: 10.1103/PhysRevLett.13.321
|
8 |
P. W. Higgs, Phys. Rev. Lett. , 1964, 13(16): 508 doi: 10.1103/PhysRevLett.13.508
|
9 |
G. S. Guralnik, C. R. Hagen, and T. W. B. Kibble, Phys. Rev. Lett. , 1964, 13(20): 585 doi: 10.1103/PhysRevLett.13.585
|
10 |
P. W. Higgs, Phys. Rev. , 1966, 145(4): 1156 doi: 10.1103/PhysRev.145.1156
|
11 |
T. Aaltonen, . [CDF and D0 Collaborations], arXiv: 1204.0042 , 2012
|
12 |
T. Aaltonen, . [CDF and D0 Collaborations], Phys. Rev. D , 2012, 86: 092003 doi: 10.1103/PhysRevD.86.092003
|
13 |
The ALEPH, CDF, D0, DELPHI, L3, OPAL, and SLD Collaborations, the LEP ElectroweakWorking Group, the Tevatron Electroweak Working Group, and the SLD Electroweak and Heavy Flavor Working Groups, arXiv: 1012.2367v2 , 2011
|
14 |
The ALEPH, DELPHI, L3 and OPAL Collaborations, and the LEP Working Group for Higgs Boson Searches, Phys. Lett. B , 2003, 565: 61
|
15 |
G. Aad, . [ATLAS Collaboration], Phys. Lett. B , 2012, 716: 1 doi: 10.1016/j.physletb.2012.08.020
|
16 |
S. Chatrchyan, . [CMS Collaboration], Phys. Lett. B , 2012, 716: 30 doi: 10.1016/j.physletb.2012.08.021
|
17 |
G. Aad, . [ATLAS Collaboration], arXiv: 1207.0210 , 2012; submitted to Phys. Lett. B .
|
18 |
S. Chatrchyan, . [CMS Collaboration], Phys. Lett. B , 2012, 710: 284 doi: 10.1016/j.physletb.2012.02.085
|
19 |
CDF and D0 use cylindrical coordinate systems with origins in the centers of the detectors, where θ and ? are the polar and azimuthal angles, respectively, and pseudora pidity is η= .ln tan(θ/2). The missing ET (E?T) is defined by E?T = -ΣiETin^i, i = calorimeter tower number, where n^i is a unit vector perpendicular to the beam axis and pointing at the ith calorimeter tower. E?T is corrected for high-energy muons and also jet energy corrections.We define E?T = |E?T|.The transverse momentum pTis defined to be psin θ.
|
20 |
T. Sj?strand, S. Mrenna, and P. Skands, J. High Energy Phys. , 2006, 05: 026. We use pythia version 6.216 to generate the Higgs boson signals.
|
21 |
H. L. Lai, J. Huston, S. Kuhlmann, J. Morfin, F. Olness, J. F. Owens, J. Pumplin, and W. K. Tung, Eur. Phys. J. C , 2000, 12(3): 375 doi: 10.1007/s100529900196
|
22 |
J. Pumplin, , J. High Energy Phys. , 2002, 07: 012
|
23 |
C. Anastasiou, R. Boughezal, and F. Petriello, J. High Energy Phys. , 2009, 04: 003
|
24 |
D. de Florian and M. Grazzini, Phys. Lett. B , 2009, 674(4-5): 291 doi: 10.1016/j.physletb.2009.03.033
|
25 |
J. Baglio and A. Djouadi, J. High Energy Phys. , 2010, 10: 064
|
26 |
O. Brein, R. V. Harlander, M. Weisemann, and T. Zirke, Eur. Phys. J. C , 2012, 72(2): 1868 doi: 10.1140/epjc/s10052-012-1868-6
|
27 |
P. Bolzoni, F. Maltoni, S. O. Moch, and M. Zaro, Phys. Rev. Lett. , 2010, 105(1): 011801 doi: 10.1103/PhysRevLett.105.011801
|
28 |
M. Ciccolini, A. Denner, and S. Dittmaier, Phys. Rev. Lett. , 2007, 99(16): 161803 doi: 10.1103/PhysRevLett.99.161803
|
29 |
M. Ciccolini, A. Denner, and S. Dittmaier, Phys. Rev. D , 2008, 77(1): 013002 doi: 10.1103/PhysRevD.77.013002
|
30 |
A. D. Martin, W. J. Stirling, R. S. Thorne, and G. Watt, Eur. Phys. J. C , 2009, 63(2): 189 doi: 10.1140/epjc/s10052-009-1072-5
|
31 |
S. Alekhin, . [PDF4LHC Working Group], arXiv: 1101.0536 , 2011
|
32 |
M. Botje, . [PDF4LHC Working Group], arXiv: 1101.0538 , 2011
|
33 |
C. Anastasiou, G. Dissertori, M. Grazzini, F. St?ckli, and B. R. Webber, J. High Energy Phys. , 2009, 08: 099
|
34 |
S. Dittmaier, . [LHC Higgs Cross Section Working Group], arXiv: 1201.3084 , 2012
|
35 |
A. Djouadi, J. Kalinowski, and M. Spira, Comput. Phys. Commun. , 1998, 108(1): 56 doi: 10.1016/S0010-4655(97)00123-9
|
36 |
A. Bredenstein, A. Denner, S. Dittmaier, and M. M. Weber, Phys. Rev. D , 2006, 74(1): 013004 doi: 10.1103/PhysRevD.74.013004
|
37 |
A. Bredenstein, A. Denner, S. Dittmaier, A. Mück, and M. M. Weber, J. High Energy Phys. , 2007, 02: 080
|
38 |
G. Bozzi, S. Catani, D. de Florian, and M. Grazzini, Phys. Lett. B , 2003, 564(1-2): 65 doi: 10.1016/S0370-2693(03)00656-7
|
39 |
G. Bozzi, S. Catani, D. de Florian, and M. Grazzini, Nucl. Phys. B , 2006, 737(1-2): 73 doi: 10.1016/j.nuclphysb.2005.12.022
|
40 |
M. Mangano, M. Moretti, F. Piccinini, R. Pittau, and A. Polosa, J. High Energy Phys. , 2003, 07: 001
|
41 |
S. Frixione and B. R. Webber, J. High Energy Phys. , 2002, 06: 029
|
42 |
G. Corcella, I. G. Knowles, G. Marchesini, S. Moretti, K. Odagiri, P. Richardson, M. H. Seymour, and B. R. Webber, J. High Energy Phys. , 2001, 01: 010
|
43 |
A. Pukhov, E. Boos, M. Dubinin, V. Edneral, V. Ilyin, D. Kovalenko, A. Kryukov, V. Savrin, S. Shichanin, and A. Semenov, arXiv: hep-ph/9908288 , 1999
|
44 |
E. Boos, V. Bunichev, M. Dubinin, L. Dudko, V. Ilyin, A. Kryukov, V. Edneral, V. Savrin, A. Semenov, and A. Sherstnev, Nucl. Instrum. Methods Phys. Res.: Sect. A , 2004, 534: 250 doi: 10.1016/j.nima.2004.07.096
|
45 |
E. E. Boos, V. E. Bunichev, L. V. Dudko, V. I. Savrin, and A. V. Sherstnev, Phys. At. Nucl. , 2006, 69(8): 1317 doi: 10.1134/S1063778806080084
|
46 |
J. M. Campbell and R. K. Ellis, Phys. Rev. D , 1999, 60(11): 113006 doi: 10.1103/PhysRevD.60.113006
|
47 |
U. Langenfeld, S. Moch, and P. Uwer, Phys. Rev. D , 2009, 80(5): 054009 doi: 10.1103/PhysRevD.80.054009
|
48 |
N. Kidonakis, Phys. Rev. D , 2006, 74(11): 114012 doi: 10.1103/PhysRevD.74.114012
|
49 |
R. Hamberg, W. L. van Neerven, and T. Matsuura, Nucl. Phys. B , 1991, 359(2-3): 343; Erratum, Nucl. Phys. B , 2002, 644: 403 doi: 10.1016/S0550-3213(02)00814-3
|
50 |
A heavy-.avor jet is a reconstructed cluster of calorimeter energies associated with particles produced in the hadronization and decay of a bottom or charm quark.
|
51 |
A B-tagged jet is one identified to have originated from the decay of a heavy .avor quark.
|
52 |
D. Acosta, . [CDF Collaboration], Phys. Rev. D , 2005, 71: 032001 doi: 10.1103/PhysRevD.71.032001
|
53 |
A. Abulencia, . [CDF Collaboration], J. Phys. G , 2007, 34: 2457 doi: 10.1088/0954-3899/34/12/001
|
54 |
V. M. Abazov, . [D0 Collaboration], Nucl. Instrum. Methods Phys. Res.: Sect. A , 2006, 565: 463 doi: 10.1016/j.nima.2006.05.248
|
55 |
M. Abolins, ., Nucl. Instrum. Methods Phys. Res.: Sect. A , 2008, 584: 75 doi: 10.1016/j.nima.2007.10.014
|
56 |
R. Angstadt, ., Nucl. Instrum. Methods Phys. Res.: Sect. A , 2010, 622: 298 doi: 10.1016/j.nima.2010.04.148
|
57 |
For a recent review, see: P. C. Bhat, Ann. Rev. Nucl. Part. Sci. , 2011, 61(1): 281. The specific details of each analysis’s MVA are described in the respective references . doi: 10.1146/annurev.nucl.012809.104427
|
58 |
V. M. Abazov, , Nucl. Instrum. Methods Phys. Res.: Sect. A , 2010, 620: 490 doi: 10.1016/j.nima.2010.03.118
|
59 |
J. Freeman, . Nucl. Instrum. Methods Phys. Res.: Sect. A , 2013, 697: 64 doi: 10.1016/j.nima.2012.09.021
|
60 |
D. Acosta, . [CDF Collaboration], Phys. Rev. D , 2005, 71: 052003 doi: 10.1103/PhysRevD.71.052003
|
61 |
A. Abulencia, . [CDF Collaboration], Phys. Rev. D , 2006, 74: 072006 doi: 10.1103/PhysRevD.74.072006
|
62 |
Statistics, in: K. Nakamura, . [Particle Data Group], J. Phys. G , 2010, 37: 075021. doi: 10.1088/0954-3899/37/7A/075021
|
63 |
T. Aaltonen, . [CDF Collaboration], Phys. Rev. Lett. , 2012, 109(11): 111802 doi: 10.1103/PhysRevLett.109.111802
|
64 |
V. M. Abazov, . [D0 Collaboration], Phys. Rev. Lett. , 2012, 109(12): 121802 doi: 10.1103/PhysRevLett.109.121802
|
65 |
W. Fisher, FERMILAB-TM-2386-E , 2006
|
66 |
T. Junk Nucl. Instrum. Methods Phys. Res.: Sect. A , 1999, 434: 435 doi: 10.1016/S0168-9002(99)00498-2
|
67 |
A. L. Read, J. Phys. G , 2002, 28(10): 2693 doi: 10.1088/0954-3899/28/10/313
|
68 |
I. W. Stewart and F. J. Tackmann, Phys. Rev. D , 2012, 85(3): 034011 doi: 10.1103/PhysRevD.85.034011
|
69 |
J. M. Campbell, R. K. Ellis, and C. Williams, Phys. Rev. D , 2010, 81(7): 074023 doi: 10.1103/PhysRevD.81.074023
|
70 |
L. Lyons, Annals of Applied Statistics , 2008, 2(3): 887
|
71 |
O. J. Dunn, J. Am. Stat. Assoc. , 1961, 56(293): 52 doi: 10.1080/01621459.1961.10482090
|
72 |
A particular decay mode defined by an experimental signature as done here may be an admixture of several, though dominated by the one denoted.
|
73 |
V. Barger, J. L. Hewett, and R. J. N. Phillips, Phys. Rev. D , 1990, 41(11): 3421 doi: 10.1103/PhysRevD.41.3421
|
74 |
H. P. Nilles, Phys. Rep. , 1984, 110(1-2): 1 doi: 10.1016/0370-1573(84)90008-5
|
75 |
H. E. Haber, and G. L. Kane, Phys. Rep. , 1985, 117(2-4): 75 doi: 10.1016/0370-1573(85)90051-1
|
76 |
The ALEPH Collaboration, The DELPHI Collaboration, The L3 Collaboration, and The OPAL Collaboration, Eur. Phys. J. C , 2006, 47: 547
|
77 |
T. Affolder, . [CDF Collaboration], Phys. Rev. Lett. , 2001, 86: 4472 doi: 10.1103/PhysRevLett.86.4472
|
78 |
A. Abulencia, . [CDF Collaboration], Phys. Rev. Lett. , 2006, 96: 011802 doi: 10.1103/PhysRevLett.96.011802
|
79 |
T. Aaltonen, . [CDF Collaboration], Phys. Rev. D , 2012, 85: 032005 doi: 10.1103/PhysRevD.85.032005
|
80 |
V. M. Abazov, . [D0 Collaboration], Phys. Rev. Lett. , 2005, 95(15): 151801 doi: 10.1103/PhysRevLett.95.151801
|
81 |
V. M. Abazov, . [D0 Collaboration], Phys. Rev. Lett. , 2006, 97(12): 121802 doi: 10.1103/PhysRevLett.97.121802
|
82 |
V. M. Abazov, . [D0 Collaboration], Phys. Rev. Lett. , 2008, 101(7): 071804 doi: 10.1103/PhysRevLett.101.071804
|
83 |
V. M. Abazov, . [D0 Collaboration], Phys. Rev. Lett. , 2008, 101(22): 221802 doi: 10.1103/PhysRevLett.101.221802
|
84 |
V. M. Abazov, . [D0 Collaboration], Phys. Rev. Lett. , 2009, 102(5): 051804 doi: 10.1103/PhysRevLett.102.051804
|
85 |
V. M. Abazov, . [D0 Collaboration], Phys. Rev. Lett. , 2010, 104(15): 151801 doi: 10.1103/PhysRevLett.104.151801
|
86 |
V. M. Abazov, . [D0 Collaboration], Phys. Lett. B , 2011, 698: 97 doi: 10.1016/j.physletb.2011.02.062
|
87 |
V. M. Abazov, . [D0 Collaboration], Phys. Rev. Lett. , 2011, 107(12): 121801 doi: 10.1103/PhysRevLett.107.121801
|
88 |
V. M. Abazov, . [D0 Collaboration], Phys. Lett. B , 2012, 707: 323 doi: 10.1016/j.physletb.2011.12.050
|
89 |
V. M. Abazov, . [D0 Collaboration], Phys. Lett. B , 2012, 710: 569 doi: 10.1016/j.physletb.2012.03.021
|
90 |
CMS Collaboration, Phys. Rev. Lett. , 2011, 106: 231801 doi: 10.1103/PhysRevLett.106.231801
|
91 |
ATLAS Collaboration, Phys. Lett. B , 2011, 705: 174 doi: 10.1016/j.physletb.2011.10.001
|
92 |
CMS Collaboration, Phys. Lett. B , 2012, 713: 68 doi: 10.1016/j.physletb.2012.05.028
|
93 |
S. Heinemeyer, W. Hollik, and G. Weiglein, Eur. Phys. J. C , 1999, 9: 343, FEYNHIGGS version 2.6.8 is used .
|
94 |
S. Heinemeyer, W. Hollik, and G. Weiglein, Comput. Phys. Commun. , 2000, 124(1): 76 doi: 10.1016/S0010-4655(99)00364-1
|
95 |
G. Degrassi, S. Heinemeyer, W. Hollik, P. Slavich, and G. Weiglein, Eur. Phys. J. C , 2003, 28(1): 133 doi: 10.1140/epjc/s2003-01152-2
|
96 |
M. Frank, T. Hahn, S. Heinemeyer, W. Hollik, H. Rzehak, and G. Weiglein, J. High Energy Phys. , 2007, 02: 047
|
97 |
L. Hofer, U. Nierste, and D. Shere, J. High Energy Phys. , 2009, 10: 081
|
98 |
D. Noth and M. Spira, Phys. Rev. Lett. , 2008, 101(18): 181801 doi: 10.1103/PhysRevLett.101.181801
|
99 |
MSUSY = 1 TeV, Xt = 2 TeV, M2 = 0.2 TeV, |μ| = 0.2 TeV, and mg = 0.8 TeV .
|
100 |
M. Carena, S. Heinemeyer, C. E. M. Wagner, and G. Weiglein, Eur. Phys. J. C , 2006, 45(3): 797 doi: 10.1140/epjc/s2005-02470-y
|
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