Since the discovery of the Higgs boson in 2012, detailed studies of its properties have been ongoing. Besides its mass, its width - related to its lifetime - is an important parameter. One way to determine this quantity is by measuring its off-shell production, where the Higgs boson mass is far away from its nominal value, and relating it to its on-shell production, where the mass is close to the nominal value. Here, we report evidence for such off-shell contributions to the production cross section of two Z bosons with data from the CMS experiment at the CERN Large Hadron Collider. We constrain the total rate of the off-shell Higgs boson contribution beyond the Z boson pair production threshold, relative to its standard model expectation, to the interval [0.0061, 2.0] at 95% confidence level. The scenario with no off-shell contribution is excluded at a $p$-value of 0.0003 (3.6 standard deviations). We measure the width of the Higgs boson as $\Gamma_{\mathrm{H}}$ = 3.2 $_{-1.7}^{+2.4}$ MeV, in agreement with the standard model expectation of 4.1 MeV. In addition, we set constraints on anomalous Higgs boson couplings to W and Z boson pairs.
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Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production. HEPData (collection).
https://doi.org/10.17182/hepdata.127288
or, if you prefer, a specific version of the
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CMS
Collaboration
(2022).
Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production (Version 1). HEPData (collection).
https://doi.org/10.17182/hepdata.127288.v1
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CMS
Collaboration
(2022).
“GGsm vs -2dNLL (SM-like (f_{ai}=0) observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t1
CMS
Collaboration
(2022).
“GGsm vs -2dNLL (f_{a2} (u) observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t2
CMS
Collaboration
(2022).
“GGsm vs -2dNLL (f_{a3} (u) observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t3
CMS
Collaboration
(2022).
“GGsm vs -2dNLL (f_{#Lambda1} (u) observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t4
CMS
Collaboration
(2022).
“GGsm vs -2dNLL (SM-like (f_{ai}=0) expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t5
CMS
Collaboration
(2022).
“GGsm vs -2dNLL (f_{a2} (u) expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t6
CMS
Collaboration
(2022).
“GGsm vs -2dNLL (f_{a3} (u) expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t7
CMS
Collaboration
(2022).
“GGsm vs -2dNLL (f_{#Lambda1} (u) expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t8
CMS
Collaboration
(2022).
“GGsm vs -2dNLL (2l2#nu off-shell + 4l on-shell observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t9
CMS
Collaboration
(2022).
“GGsm vs -2dNLL (4l off-shell + 4l on-shell observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t10
CMS
Collaboration
(2022).
“GGsm vs -2dNLL (2l2#nu off-shell + 4l on-shell expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t11
CMS
Collaboration
(2022).
“GGsm vs -2dNLL (4l off-shell + 4l on-shell expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t12
CMS
Collaboration
(2022).
“r_offshell vs -2dNLL (R_{V,F}^{off-shell}=1 observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t13
CMS
Collaboration
(2022).
“r_offshell vs -2dNLL (R_{V,F}^{off-shell} (u) observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t14
CMS
Collaboration
(2022).
“r_offshell vs -2dNLL (R_{V,F}^{off-shell}=1 (2l2#nu) observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t15
CMS
Collaboration
(2022).
“r_offshell vs -2dNLL (R_{V,F}^{off-shell} (u, 2l2#nu) observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t16
CMS
Collaboration
(2022).
“r_offshell vs -2dNLL (R_{V,F}^{off-shell}=1 expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t17
CMS
Collaboration
(2022).
“r_offshell vs -2dNLL (R_{V,F}^{off-shell} (u) expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t18
CMS
Collaboration
(2022).
“r_offshell vs -2dNLL (R_{V,F}^{off-shell}=1 (2l2#nu) expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t19
CMS
Collaboration
(2022).
“r_offshell vs -2dNLL (R_{V,F}^{off-shell} (u, 2l2#nu) expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t20
CMS
Collaboration
(2022).
“rf_offshell vs -2dNLL (2l2#nu+4l observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t21
CMS
Collaboration
(2022).
“rf_offshell vs -2dNLL (Only 2l2#nu observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t22
CMS
Collaboration
(2022).
“rf_offshell vs -2dNLL (2l2#nu+4l expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t23
CMS
Collaboration
(2022).
“rf_offshell vs -2dNLL (Only 2l2#nu expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t24
CMS
Collaboration
(2022).
“rv_offshell vs -2dNLL (2l2#nu+4l observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t25
CMS
Collaboration
(2022).
“rv_offshell vs -2dNLL (Only 2l2#nu observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t26
CMS
Collaboration
(2022).
“rv_offshell vs -2dNLL (2l2#nu+4l expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t27
CMS
Collaboration
(2022).
“rv_offshell vs -2dNLL (Only 2l2#nu expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t28
CMS
Collaboration
(2022).
“rf_offshell vs rv_offshell observed” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t29
CMS
Collaboration
(2022).
“fa2 vs -2dNLL (#Gamma_{H}=4.1 MeV observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t30
CMS
Collaboration
(2022).
“fa2 vs -2dNLL (#Gamma_{H} (u) observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t31
CMS
Collaboration
(2022).
“fa2 vs -2dNLL (On-shell 4l observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t32
CMS
Collaboration
(2022).
“fa2 vs -2dNLL (#Gamma_{H}=4.1 MeV expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t33
CMS
Collaboration
(2022).
“fa2 vs -2dNLL (#Gamma_{H} (u) expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t34
CMS
Collaboration
(2022).
“fa2 vs -2dNLL (On-shell 4l expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t35
CMS
Collaboration
(2022).
“fa3 vs -2dNLL (#Gamma_{H}=4.1 MeV observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t36
CMS
Collaboration
(2022).
“fa3 vs -2dNLL (#Gamma_{H} (u) observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t37
CMS
Collaboration
(2022).
“fa3 vs -2dNLL (On-shell 4l observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t38
CMS
Collaboration
(2022).
“fa3 vs -2dNLL (#Gamma_{H}=4.1 MeV expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t39
CMS
Collaboration
(2022).
“fa3 vs -2dNLL (#Gamma_{H} (u) expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t40
CMS
Collaboration
(2022).
“fa3 vs -2dNLL (On-shell 4l expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t41
CMS
Collaboration
(2022).
“fL1 vs -2dNLL (#Gamma_{H}=4.1 MeV observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t42
CMS
Collaboration
(2022).
“fL1 vs -2dNLL (#Gamma_{H} (u) observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t43
CMS
Collaboration
(2022).
“fL1 vs -2dNLL (On-shell 4l observed)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t44
CMS
Collaboration
(2022).
“fL1 vs -2dNLL (#Gamma_{H}=4.1 MeV expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t45
CMS
Collaboration
(2022).
“fL1 vs -2dNLL (#Gamma_{H} (u) expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t46
CMS
Collaboration
(2022).
“fL1 vs -2dNLL (On-shell 4l expected)” of “Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.127288.v1/t47
When using this data, please cite the original publication:
CMS
Collaboration
(2022).
Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production. Nature Phys. 18 (2022) 1329-1334.
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