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Measurement of the electric charge of the top quark intt¯events
Abazov, V. M.,Abbott, B.,Acharya, B. S.,Adams, M.,Adams, T.,Agnew, J. P.,Alexeev, G. D.,Alkhazov, G.,Alton, A.,Askew, A.,Atkins, S.,Augsten, K.,Avila, C.,Badaud, F.,Bagby, L.,Baldin, B.,Bandurin, D. V American Physical Society 2014 PHYSICAL REVIEW D - Vol.90 No.5
Search for theX(4140)state inB+→J/ψϕK+decays with the D0 detector
Abazov, V. M.,Abbott, B.,Acharya, B. S.,Adams, M.,Adams, T.,Agnew, J. P.,Alexeev, G. D.,Alkhazov, G.,Alton, A.,Askew, A.,Atkins, S.,Augsten, K.,Avila, C.,Badaud, F.,Bagby, L.,Baldin, B.,Bandurin, D. V American Physical Society 2014 PHYSICAL REVIEW D - Vol.89 No.1
<P>We investigate the decay B+ -> J/psi phi K+ in a search for the X(4140) state, a narrow threshold resonance in the J/psi phi system. The data sample corresponds to an integrated luminosity of 10.4 fb(-1) of p (p) over bar collisions at root s = 1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider. We observe a mass peak with a statistical significance of 3.1 standard deviations and measure its invariant mass to be M = 4159.0 +/- 4.3(stat) +/- 6.6(syst) MeV and its width to be Gamma = 19.9 +/- 12.6(stat)(-8.0)(+3.0)(syst) MeV.</P>
Abazov, V.M.,Abbott, B.,Acharya, B.S.,Adams, M.,Adams, T.,Agnew, J.P.,Alexeev, G.D.,Alkhazov, G.,Alton, A.,Askew, A.,Atkins, S.,Augsten, K.,Avila, C.,Badaud, F.,Bagby, L.,Baldin, B.,Bandurin, D.V.,Ban Elsevier 2015 Physics letters: B Vol.743 No.-
<P><B>Abstract</B></P> <P>We present a measurement of the cross sections for the associated production of a <I>W</I> boson with at least one heavy quark jet, <I>b</I> or <I>c</I>, in proton–antiproton collisions. Data corresponding to an integrated luminosity of 8.7 <SUP> fb − 1 </SUP> recorded with the D0 detector at the Fermilab Tevatron p p ¯ Collider at s = 1.96 TeV are used to measure the cross sections differentially as a function of the jet transverse momenta in the range 20 to 150 GeV. These results are compared to calculations of perturbative QCD theory as well as predictions from Monte Carlo generators.</P>
Abazov, V.M.,Abbott, B.,Acharya, B.S.,Adams, M.,Adams, T.,Alexeev, G.D.,Alkhazov, G.,Alton, A.,Alverson, G.,Aoki, M.,Askew, A.,Atkins, S.,Augsten, K.,Avila, C.,Badaud, F.,Bagby, L.,Baldin, B.,Bandurin Elsevier 2012 Physics letters: B Vol.714 No.1
<P><B>Abstract</B></P><P>We present measurements of the differential cross section dσ/dpTγ for the inclusive production of a photon in association with a <I>b</I>-quark jet for photons with rapidities |<SUP>yγ</SUP>|<1.0 and 30<pTγ<300?GeV, as well as for photons with 1.5<|<SUP>yγ</SUP>|<2.5 and 30<pTγ<200?GeV, where pTγ is the photon transverse momentum. The <I>b</I>-quark jets are required to have <SUB>pT</SUB>>15 GeV and rapidity |<SUP>yjet</SUP>|<1.5. The results are based on data corresponding to an integrated luminosity of 8.7 fb<SUP>−1</SUP>, recorded with the D0 detector at the Fermilab Tevatron pp¯ Collider at s=1.96?TeV. The measured cross sections are compared with next-to-leading order perturbative QCD calculations using different sets of parton distribution functions as well as to predictions based on the <SUB>kT</SUB>-factorization QCD approach, and those from the <SMALL>SHERPA</SMALL> and <SMALL>PYTHIA</SMALL> Monte Carlo event generators.</P>
Study ofCP-violating charge asymmetries of single muons and like-sign dimuons inpp¯collisions
Abazov, V. M.,Abbott, B.,Acharya, B. S.,Adams, M.,Adams, T.,Agnew, J. P.,Alexeev, G. D.,Alkhazov, G.,Alton, A.,Askew, A.,Atkins, S.,Augsten, K.,Avila, C.,Badaud, F.,Bagby, L.,Baldin, B.,Bandurin, D. V American Physical Society 2014 PHYSICAL REVIEW D - Vol.89 No.1