Contact
Name
Andrey Popov

Position
Former member
PhD student in CP3 from November 2012 to October 2015
Current position: Postdoc at IPNL (Lyon, France)
Projects
Research directions:
Experiments and collaborations:
Active projects
Single top studies at LHC
Andrea Giammanco

The electroweak production cross section of single top quarks is an important measurement for LHC, being a potential window on "new physics" effects.
Past achievements of this group include the very first measurement at 7 TeV (in t channel) with 2010 data, followed by the most precise inclusive cross section measurements of t-channel cross section at 7, 8 and 13 TeV, and the first differential measurements at 13 TeV; the most precise |Vtb| extraction from single top in the world; the first measurement of W-helicity fractions in a single-top topology; the first observation of the tW production mode; the first measurement of single-top polarization in t channel; stringent limits on anomalous tWb, tgu, tgc couplings.

External collaborators: CMS collaboration.
Testing the sign of the coupling of the new H(125) boson to top quarks with the CMS data
Andrea Giammanco

During 2012, the CMS and ATLAS collaborations independently reported unambiguous evidence of the existence of a new particle of mass around 125 GeV.
Several analyses are ongoing to challenge the hypothesis that the new particle is the SM Higgs. We focus on the search for its production in association with a single top quark. Due to an effect of quantum interference, this process is strongly suppressed in the Standard Model while it gets enhanced if its couplings to the top quark and to the W boson have opposite sign. An observation of this production mode would therefore be a convincing proof that this new particle does not belong to the Standard Model.
We published the first search for this process using 8 TeV data, and we expect to achieve sensitivity to anomalous values of the top Yukawa phase during the LHC Run-II.

External collaborators: CMS collaboration.

Non-active projects
Publications in CP3
All my publications on Inspire

Number of publications as CP3 member: 9

Last 5 publications

2015

CP3-15-33: Search for the associated production of a Higgs boson with a single top quark in proton-proton collisions at $sqrt{s}=8$ TeV
Khachatryan, Vardan and others

[Abstract] [PDF] [Journal] [Dial]
Refereed paper. September 29.
CP3-15-22: First look at top-quark selections with 13 TeV data
CMS collaboration

[Full text]
CMS Detector Performance Note released in occasion of the EPS-HEP 2015 conference
Public experimental note. July 24.

2014

CP3-14-76: Identification of signal events in a search for H->bb produced in association with single top quarks
Andrey Popov on behalf of the CMS collaboration

[Abstract] [PDF]
To appear in proceedings of TOP2014
Contribution to proceedings. November 28.
CP3-14-75: Measurements of single top-quark production in pp collisions by the CMS experiment
Andrey Popov on behalf of the CMS collaboration

[Abstract] [PDF]
To appear in proceedings of CKM2014
Contribution to proceedings. November 28.
CP3-14-65: Search for $H\to b\bar b$ in association with single top quarks as a test of Higgs couplings
CMS Collaboration

[Full text]
CMS Physics Analysis Summary HIG-14-015
Public experimental note. September 30.

More publications