Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 $$\,\text {TeV}$$ TeV

Abstract

Properties of the Higgs boson with mass near 125 are measured in proton-proton collisions with the CMS experiment at the LHC. Comprehensive sets of production and decay measurements are combined. The decay channels include , , , , , and pairs. The data samples were collected in 2011 and 2012 and correspond to integrated luminosities of up to 5.1 at 7 and up to 19.7 at 8. From the high-resolution and channels, the mass of the Higgs boson is determined to be . For this mass value, the event yields obtained in the different analyses tagging specific decay channels and production mechanisms are consistent with those expected for the standard model Higgs boson. The combined best-fit signal relative to the standard model expectation is at the measured mass. The couplings of the Higgs boson are probed for deviations in magnitude from the standard model predictions in multiple ways, including searches for invisible and undetected decays. No significant deviations are found.

Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry

“…Following the first run of the LHC (run 1), which finished colliding protons at the end of 2012, we have observed that the Higgs couplings are broadly in agreement with SM predictions, but with large errors, still allowing significant deviations from these values (as is discussed in section 2.1 [27][28][29]). Run 2 is due to start in spring 2015, which will greatly improve this precision.…”

Study of the Electroweak Symmetry Breaking Sector for the LHC

“…Since the present fits to LHC data [127,128] suggest a value of a close to one, these corrections are surprisingly suppressed with respect to the naively expected E 2 /(16π 2 v 2 ) contributions, typically occurring from chiral loops of chiral effective field theories. We believe that the origin of the simplicity of our results in eqs.…”

Higgs Boson Properties

“…The combination of Higgs boson searches and measurements [8][9][10][11][12][13][14] is based on a large number of analyses. Depending on the combinations being performed and properties being probed, different channels and analyses are used.…”

“…[1][2][3] The "m H " light grey triangles indicate channels contributing to the mass measurement. [8][9][10] The "J" and "J CP " grey triangles indicate channels contributing to spin and CP hypothesis tests using kinematic decay properties. [11][12][13] The "…”