Measurements of $\phi^*$ differential cross sections for Drell--Yan events in pp collisions at $\sqrt{s}=8~\mathrm{TeV}$

, constructed from the lepton angles, is correlated with the transverse momentum of the vector boson. The data were collected with the CMS experiment at a centre-of-mass energy of 8~TeV and correspond to an integrated luminosity of

19.7~\mathrm{fb}^{-1}

. The differential cross section

\mathrm{d}\sigma / \mathrm{d}\phi^*

normalised to the total cross section within the fiducial volume is measured with a precision of about

1\%

and is compared with theoretical predictions. The measured spectrum, for the range

\phi^*<0.1

, differs from the theoretical predictions by at most

5\%

(ResBos),

4\%

(

\mathrm{M{\small AD}G{\small RAPH}}

) and

9\%

(POWHEG). For higher values of

\phi^*

the deviations are as high as

9\%

,

5\%

and

18\%

in the three cases respectively.

Note:

Preliminary results

Data
p p: colliding beams
vector boson: transverse momentum
Z0: leptonic decay
muon: pair production
dimuon: final state
p p: scattering
Drell-Yan process
differential cross section: measured
differential cross section: ratio

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Measurements of ϕ∗\phi^*ϕ∗ differential cross sections for Drell--Yan events in pp collisions at s=8 TeV\sqrt{s}=8~\mathrm{TeV}s​=8 TeV

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Measurements of $\phi^*$ differential cross sections for Drell--Yan events in pp collisions at $\sqrt{s}=8~\mathrm{TeV}$