期刊
PHYSICAL REVIEW LETTERS
卷 110, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.081803
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- Science and Technology Facilities Council [ST/I005912/1 GRIDPP, ST/M002020/1, ST/I002200/1, ST/K001639/1, ST/K001531/1, PP/D004284/1, ST/L00609X/1 GRIDPP, ST/J004871/1, ST/K001604/1 CMS Upgrade, ST/K001256/1, ST/K003542/1 GRID PP, ST/K001604/1 SuperNEMO, ST/J005665/1, ST/K001604/1 LHCb, ST/L00609X/1, ST/I000410/1, ST/I505572/1, PP/E002803/1, ST/I000305/1, ST/J004901/1, ST/L005603/1, ST/K003542/1, ST/K003844/1, ST/H000925/2, ST/K001604/1 T2K, ST/J005479/1, ST/K001604/1, ST/F007094/1, ST/I003622/1 GRIDPP, ST/I003622/1, ST/I005912/1, ST/F006748/1, CMS, ST/G502347/1, ST/K001604/1 DMUK, ST/K001604/1 LHCb Upgrades, ST/K001604/1 GRIDPP, ST/K001604/1 MICE/UKNF, ST/H000925/1, ST/K003844/1 GRIDPP, GRIDPP] Funding Source: researchfish
A study is presented of the mass and spin-parity of the new boson recently observed at the LHC at a mass near 125 GeV. An integrated luminosity of 17: 3 fb(-1), collected by the CMS experiment in proton-proton collisions at center-of-mass energies of 7 and 8 TeV, is used. The measured mass in the ZZ channel, where both Z bosons decay to e or mu pairs, is 126: 2 +/- 0.6(stat) +/- 0. 2(syst) GeV. The angular distributions of the lepton pairs in this channel are sensitive to the spin-parity of the boson. Under the assumption of spin 0, the present data are consistent with the pure scalar hypothesis, while disfavoring the pure pseudoscalar hypothesis. DOI: 10.1103/PhysRevLett.110.081803
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