arXiv subjects

Alex Melnitchouk

Publications and source records attributed to Alex Melnitchouk.

5 recordsLinked to original sources

arXiv2012

W Mass results from Tevatron and LHC

Most recent results of $W$ boson mass measurements from Tevatron experiments (CDF and D0) in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ GeV are reported, using $0.2 fb^{-1}$ and $1.0 fb^{-1}$ data collected at CDF and D0, respectively. The measurements of $W$ boson properties at LHC experiments (ATLAS, CMS, and LHCb) in $pp$ collisions at $\sqrt{s}=7$ TeV, using data collected before Summer 2011, are presented. These measurements are essential at the preparation stage of the $W$ boson mass measurements at LHC. Challenges for $W$ mass measurement at the LHC in comparison with the Tevatron are outlined. Prospects for $W$ mass precision with upcoming measurements and its implications are discussed.

hep-ex↗

arXiv2010

$W$ mass and width measurements at the Tevatron

Most recent results of $W$ boson mass and width measurements performed by CDF and D are reported. at the center-of-mass energy of 1.96 TeV. Integrated luminosity ranges from 0.2 fb$^{-1}$ to 1.0 fb$^{-1}$ depending on the analysis.

hep-ex↗

arXiv2008

High mass dijet and ttbar resonance searches

We present searches for dijet and ttbar mass resonances using between 0.68 and 2.1 fb-1 of Tevatron Run II data collected by the CDF and D0 detectors. No evidence of new physics is found, and 95% C.L. limits are set on a number of new physics hypotheses, such as excited quark, Randal-Sundrum graviton, Z', W', color-octet technirho, axigluon and flavor-universal coloron, E6 diquark, quark compositeness, ADD and TeV-1-sized LED, massive gluon.

hep-ex↗

arXiv2006

D0 Search for the Higgs Boson in Multijet Events

We present two searches for the Higgs boson in \sqrt{s} = 1.96 TeV p\bar{p}collisions using data taken with the \dz detector during Run II of the Fermilab Tevatron collider. The first study is a search for neutral Higgs bosons produced in association with bottom quarks. We set upper limits on the production of neutral Higgs bosons in the mass range of 90 to 150 GeV.The second study is a search for the standard model Higgs boson produced in association with the Z boson. We study the p\bar{p}\to ZH \to ν\barν b \bar{b} channel, which is one of the most sensitive ways to search for light Higgs bosons at the Tevatron. We search for a peak in invariant mass distribution of two b-tagged jets. After subtracting the backgrounds, we set the 95% C.L. upper limits on the σ(p\bar{p} \to ZH \to ν\barν) \times BR(H) \to b\bar{b}) for Higgs masses between 105 and 135 GeV.

hep-ex↗

arXiv2005

Search for non-SM Light Higgs Boson in the h -> to gamma gamma Channel at D0 in Run II

A search for non-SM light Higgs boson with an enhanced branching fraction into photons in ppbar collisions at the Fermilab Tevatron is presented using Run II DO data taken between April 2002 and September 2003. We set 95% CL limits on the diphoton branching fraction as a function of Higgs mass for Fermiophobic and Topcolor Higgs scenarios.

hep-ex↗