Unformatted text preview: ¯ b . The main background is Wb ¯ b production, where the b ’s were produced through a gluon, photon or a Z . On the same plot, show the b ¯ b invariant mass distribution M b ¯ b for the Wh signal and the Wb ¯ b background. Notice that because of the very small Higgs width Γ h , the signal will peak very sharply at M b ¯ b = m h . In reality, however, the energy of the b-jets is not perfectly measured, which results in an uncertainty in M b ¯ b of order 10%. An easy way to account for the poor mass resolution and thus make our plot more “realistic”, is to simply in²ate the Higgs width Γ h to 0 . 1 m h ∼ 12 GeV. Hint: You may need to use the option “regularization” to constrain M b ¯ b near the s-channel gluon, photon, Z or H resonances. Problem 3. Higgs production at the LHC. Repeat Exercise 1, but for the case of Higgs production in vector-boson fusion at the LHC ( pp collider, E CM = 7 TeV). 1...
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- Spring '12
- Particle Physics, Large Hadron Collider, Higgs boson, Elementary particle, Higgs mass MH