Contact
Name
Hamed Bakhshiansohi
حامد بخشیان
Position
Postdoc. Funding: MOVE-IN.
Member since January 2016
Email
hbakhshern.ch
Address
Centre for Cosmology, Particle Physics and Phenomenology - CP3
Université catholique de Louvain
2, Chemin du Cyclotron - Box L7.01.05
B-1348 Louvain-la-Neuve
Belgium
Phone
+32 10 473217
Office
My personal homepage
Projects
I am involved in the following research directions:

Single top studies at LHC

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

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.


Show past projects.
Publications in CP3
Showing 5 publications over 9. Show all publications.
All my publications on Inspire

2018

Search for the associated production of a Higgs boson and a single top quark in pp collisions at sqrt(s)=13 TeV
CMS Collaboration
[Full text] Physics Analysis Summary HIG-18-009, Presented at the XXXIX International Conference on High Energy Physics, ICHEP 2018, Seoul, South Korea, 4-11 July, 2018
Public experimental note. 6th July.
Latest results on Higgs boson →γγ in the CMS experiment
Hamed Bakhshiansohi
[Full text] International Conference on the Structure and the Interactions of the Photon, including the 22th International Workshop on Photon-Photon Collisions, Geneva, Switzerland, 22 - 26 May 2017
Contribution to proceedings. 29th January.
Single top quark production measurements in CMS
Hamed Bakhshiansohi
[Full text] 38th International Conference on High Energy Physics (ICHEP2016)
Contribution to proceedings. 29th January.
Search for the electroweak production of charginos in final states with two τ′s in pp collisions at ps = 8 TeV using 2012 CMS experiment data
Hamed Bakhshiansohi
[Full text] XXIV International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2016)
Contribution to proceedings. 29th January.

2017

The Phase-2 Upgrade of the CMS Tracker
CMS collaboration
[Full text] CERN-LHCC-2017-009 ; CMS-TDR-014
Refereed paper. 13th December.


[UCLouvain] - [SST] [IRMP] - [SC]
Contact : Jérôme de Favereau
Research
Job opportunities Postdoctoral Position on advanced analysis techniques applied to the CMS di-Higgs study
Post-doctoral positions in collider phenomenology and particle astrophysics
Postodoctoral position in SoLid
EOS be.h : 10 PhD positions