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A measurement of the mass of the boson is presented based on proton-proton collision data recorded in 2011 at a centre-of-mass energy of 7 TeV with the ATLAS detector at the LHC, and corresponding to of integrated luminosity. The selected data sample consists of candidates in the channel and candidates in the channel. The -boson mass is obtained from template fits to the reconstructed distributions of the charged lepton transverse momentum and of the boson transverse mass in the electron and muon decay channels, yielding where the first uncertainty is statistical, the second corresponds to the experimental systematic uncertainty, and the third to the physics-modelling systematic uncertainty. A measurement of the mass difference between the and bosons yields MeV.
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http://dx.doi.org/10.1140/epjc/s10052-017-5475-4 | DOI Listing |
Eur Phys J C Part Fields
August 2025
Physics Department, Imperial College London, Prince Consort Road, London, SW7 2BW UK.
We present a search for new scalar bosons predicted by the Inert Doublet Model at an machine with centre-of-mass energies of 240 and 365 . Within this model, four additional scalar bosons ( and ) are predicted. Due to an additional symmetry, the lightest new scalar, here chosen to be , is stable and provides an adequate dark matter candidate.
View Article and Find Full Text PDFSci Rep
August 2025
San Francisco State University, 1160 Holloway Avenue, 94132, San Francisco, CA, USA.
We study a quantized field that can excite its underlying spacetime and has the properties of a bosonic field. A particle in this field is a harmonic oscillator in time, also known as a proper time oscillator, which is an excitation of spacetime. Time in this oscillator flows only forward but with varying rates.
View Article and Find Full Text PDFPhys Rev Lett
July 2025
The University of Sussex, Department of Physics and Astronomy, Brighton BN1 9RH, United Kingdom.
We determine the value of the strong coupling α_{s} and study its running over a wide range of scales as probed by the dijet production process at hadron colliders, based on a next-to-next-to-leading-order QCD analysis of LHC dijet data. From a large subset of these data a value of α_{s}(m_{Z})=0.1178±0.
View Article and Find Full Text PDFPhys Rev Lett
July 2025
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
ATOMKI nuclear anomaly has suggested a new BSM (beyond the standard model) boson with mass ∼17 MeV emitted from excited nuclei and quickly decays into a pair of e^{+}e^{-}. In order to search for the new particle, we propose a new approach that utilizes the ongoing coherent CAPTAIN-Mills (CCM) ten-ton LAr (liquid argon) detectors. The neutrons from the Lujan target can scatter inelastically, but the PMT glass in the CCM detector can produce the new boson which solves the ATOMKI anomaly.
View Article and Find Full Text PDFPhys Rev Lett
June 2025
Università di Milano, Dipartimento di Fisica, I-20133 Milan, Italy.
We consider the thrust (T) distribution in electron-positron (e^{+}e^{-}) annihilation into hadrons and we perform the all-order resummation of the large logarithms of 1-T up to full next-to-next-to-next-to-leading logarithmic (N^{3}LL) accuracy in QCD, also including the impact of next-order logarithmic corrections (N^{4}LL). We consistently combine resummation with the known fixed-order results up to next-to-next-to-leading order (NNLO). All perturbative terms up to O(α_{S}^{3}) are included in our calculation, which, thanks to a unitarity constraint, exactly reproduces, after integration over T, the next-to-next-to-next-to-leading order (N^{3}LO) result for the total cross section of e^{+}e^{-} into hadrons.
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