Pablo

Pablo Martinez Ruiz del Arbol

Email:

ORCID: 0000-0002-7737-5121

I am a particle physicist working at the CMS experiment at CERN. My current research focuses on searches for Supersymmetry and Dark Matter in the CMS detector. I am also involved in the new CMS MTD project. I am employed as a Ramon y Cajal researcher at the Institute of Physics of Cantabria (IFCA).

General Index
Education
Current and previous positions
Major achievements of scientific carreer
Fellowships and grants
Supervision of students
Teaching activities
Organization of scientific meeting
Institutional responsabilities and review activies
Selection of important publications where I had a fundamental contribution
Proceedings and talks in major international conferences
Seminars, lectures and presentations in important internal meetings
Prizes and Awards
Technology Transfer & Industry
Outreach
Check all my publications in Inspire

Education
2005-2010

PhD Thesis: "Development and application of alignment algorithms for optimization of the muon detection at the CMS experiment at the LHC"

Institute of Physics of Cantabria, Spain

Awarded with the prize to the best PhD thesis in Science by the University of Cantabria

2000-2005

Bachelor Degree in Physics

Faculty of Physics, University of Cantabria, Spain

Awarded with the prize to the best academic performance by the University of Cantabria


Current and previous positions
2017-Present

Ramon y Cajal researcher

Institute of Physics of Cantabria, University of Cantabria

2016-2017

Senior Scientist

Institute for Particle Physics (IPP), Swiss Federal Institute of Technology Zurich (ETHZ)

2010-2016

Post-doctoral researcher and teacher assistant

Institute for Particle Physics (IPP), Swiss Federal Institute of Technology Zurich (ETHZ)

2005-2010

Pre-doctoral researcher

Institute of Physics of Cantabria, University of Cantabria


Major achievements of scientific career
2017-Present

Convener of the "Certification, DQM and Validation group of the Muon POG"

In charge of coordinating the certification, data quality monitoring and validation of the Muon POG. This implies organizing the DQM tools, and also assessing the quality of the software releases and the data collected by the experiment.

2016-Present

Convener of the "SUSY Third Generation Searches group"

In charge of coordinating the stop, sbottom and stau searches withing the CMS SUSY group.

2013-2015

Convener of the "SUSY Trigger, Monte Carlo and Interpretations group"

In charge of coordinating the CMS Supersymmetry trigger and Monte Carlo strategy for the Run 2 data-taking starting in 2015. Both strategies were designed and implemented and are nowadays the baseline for all the CMS Supersymmetry searches.

2012-Present

Leader of the Opposite Sign Same Flavor lepton search “The Edge” at CMS

I led a group of post-docs and students from several universities during 3 years. After an intense process of internal review I presented the final results to the collaboration in October 2014. This search was acknowledged as the most interesting indication of New Physics seen by CMS during the Run 1 of the LHC. Nowadays I continue leading this search in the context of Run 2.

2012-2014

First measurement of the b-jet energy correction using the Z+b method at the LHC

I initiated in 2012 an innovative analysis to measure the energy scale of the b-jets using a novel technique invented by me to estimate the effect of the neutrinos. The results were very competitive and were presented in the TOP conference in 2014 as one of the highlights from CMS. I was the contact and only contributor of this analysis. Publication is in preparation.

2005-2010

First aligned geometries of the muon system of CMS at the LHC start-up

During my thesis I developed novel methods to align the CMS muon system using muons. I was selected as contact person of the muon alignment group and responsible of the geometry databases. The geometries used in the start-up of the LHC were calculated and maintained by me. In recognition CMS awarded me in 2010 with the “Outstanding Achievment Award”. University of Cantabria also awarded me with the prize to the best PhD thesis in science.


Fellowships and grants
2006-2010

I3P Pre-Doctoral Scholarship

Spanish National Research Council (CSIC)

Most prestigious grant for development of PhD thesis by the CSIC

2005

Introduction to research for undergraduate students scholarship

Spanish National Research Council (CSIC)

2004

Introduction to research for undergraduate students scholarship

Spanish Ministry of Science and Technology


Supervision of students
2018-Present

Agustín Lantero, end-of-degree project, Institute of Physics of Cantabria (IFCA).

Understanding of the top mass reconstruction and extension to dark matter searches using the dark pt variable. (Exact title to be determined).

2015-Present

Juan Ferrero, PhD thesis, Institute of Physics of Cantabria (IFCA).

Search for dark matter in association with a top-antitop pair with the CMS experiment. (Exact title to be determined).

2015-Present

Leonora Vesterbacka, PhD thesis, Institute for Particle Physics (IPP), ETHZ

Search of direct production of charginos and neutralinos in the opposite sign same flavor channel using the CMS experiment. (Exact title to be determined).

2015-2016

Sergio Sanchez, Master thesis, Universidad Autonoma de Barcelona

“Development of new background rejection and estimation methods in a search for BSM physics with two leptons, jets and missing transverse momentum using the CMS detector.”

2015

Sergio Sanchez, graduate student, Summer Student program (CERN)

“Feasibility Study of the Event-Mixing Technique for Top-Pair Background Prediction”

2010-2014

Marco-Andrea Buchmann, PhD thesis, Institute For Particle Physics (IPP), ETHZ

“Search for Physics Beyond the Standard Model in the Opposite-Sign Same-Flavor Dilepton Final State with the CMS Detector”

2013

Pascal Jordi, Master thesis, Institute for Particle Physics (IPP), ETHZ

”Studies of the Mass Dependence of the Jet-Z balance in searches for Supersymmetry”


Teaching activities
2017-Present

Teacher at the Master in Data Sciencie. University of Cantabria and International University Menendez y Pelayo.

(Teacher of "Fundamentals of statistics for data science".)

2017-Present

Teacher at the University of Cantabria.

(Responsible of the "Physics of elementary particles" subject, also teacher in the "Advanced Laboratory" of the Physics degree, and in the "Advanced Particle Physics" subject of the Master.)

2010-2017

Teacher Assistant for various topics at the Departament of Physics of ETHZ

(Introduction to Nuclear and Particle Physics, Introduction to Physics 1 and 2, ...)

2012

Teacher at the CMS Data Analysis School for graduate students, Pisa, Italy


Organization of scientific meetings
2017

CMS SUSY Workshop, Ghant, Belgium, CMS internal meeting, 200 participants

Scientific committee, chairman and responsible of the TBT session

2014

CMS SUSY Workshop, Fermilab, Chicago, CMS internal meeting, 200 participants

Scientific committee, chairman and responsible of the trigger and Monte Carlo session

2014

CMS SUSY Workshop, LIP, Lisbon, CMS internal meeting, 100 participants

Scientific committee, chairman and responsible of the trigger and Monte Carlo session

2009

CMS Muon Barrel Workshop, CERN, Geneva, CMS internal meeting, 50 participants

Scientific committee, chairman and responsible of the Drift Tube Chambers session


Institutional responsabilitites and review activities
2018-Present

Member of the Institutonal Board of the MTD project at CMS.

2016

Member of PhD. Thesis Committee: “Study of Guided Waves Proppagation in Multilayered Media. Application to the inspection of some industrial structures.”

Universidad de Oviedo, Spain

2016

Member of PhD. Thesis Committee: “Characterization of mechanical properties of adhesive joints subjected to radiactive environments in particle detector alignment systems”

Universidad de Cantabria, Spain

2014-Present

Reviewer for "The European Physics Journal C"

2010-Present

Regular internal reviewer of CMS papers

2012

Member of PhD. Thesis Committee: “Measurement of electroweak processes in muon decay channels, in pp collisions at sqrt(s) = 7 TeV, in the CMS experiment at LHC”

Universidad Complutense de Madrid, Spain

2011

Member of PhD. Thesis Committee: “Search for new heavy bosons decaying into muon-neutrino pairs at the CMS experiment”

Universidad Complutense de Madrid, Spain


Selection of important publications where I had a fundamental contribution
2019

CMS Collaboration (A. M. Sirnyan et al.), “Search for supersymmetric partners of electrons and muons in proton–proton collisions at sqrt(s)=13TeV", Physics Letters B, Volume 790, 10 March 2019, Pages 140-166, 10.1016/j.physletb.2019.01.005

This publication shows a search for sleptons using the 2016 dataset collected by the CMS experiment. This analysis was conducted by Leonora Versterbacka for her PhD thesis with my help and supervision.

2018

CMS Collaboration (A. M. Sirunyan et al.), “Search for Dark Matter Particles Produced in Association with a Top Quark Pair at √s = 13 TeV", Phys. Rev. Lett. 122, 011803, 2019, 10.1103/PhysRevLett.122.011803

This publication targets a search for DM produced in association of a top quark pair. I contributed to the dilepton channel on this analysis and the analysis was part of the thesis of Juan Ferrero Garcia.

2018

CMS Collaboration (Vardan Khachatryan et al.), “Search for new phenomena in final states with two opposite-charge, same-flavor leptons, jets, and missing transverse momentum in pp collisions at √s = 13 TeV”, JHEP 03 (2018) 076, 10.1007/JHEP03(2018)076

This publication contains a search for SUSY in models with both strong and electroweak production of sparticles. I was the contact person of this analysis in CMS.

2017

CMS Collaboration (Vardan Khachatryan et al.), “Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV”, JINST 12 P01024, DOI:10.1088/1748-0221/12/02/P02014, e-Print:arXiv:1607.03663

This publication contains a summary of procedures used to calibrate the jets. The paper includes several sub-analysis. I was the author of the calculation of flavor dependent corrections for b-jets.

2017

CMS Collaboration (Vardan Khachatryan et al.), “The CMS trigger system”, JINST 12 P01020, DOI:10.1088/1748-0221/12/01/P01020, e-Print:arXiv:1609.02366

This publication contains a summary of the CMS Trigger performance during Run 1. As convener of the SUSY trigger group I was the editor of the SUSY triggers section.

2016

CMS Collaboration (Vardan Khachatryan et al.), "Search for new physics in final states with two opposite-sign, same-flavor leptons, jets, and missing transverse momentum in pp collisions at sqrt s = 13 TeV", Phys. (2016) 2016: 13, DOI:10.1007/JHEP12(2016)013, e-Print:arXiv:1607.00915

This publication replicates and improves the dilepton search performed during Run I with 2015 data at 13 TeV. A new likelihood discriminator was developed in order to reject the ttbar background. Some of these results were also part of a Master Thesis supervised by me.

2014

CMS Collaboration (Vardan Khachatryan et al.), "Search for Physics Beyond the Standard Model in Events with Two Leptons, Jets, and Missing Transverse Momentum in pp Collisions at sqrt(s) = 8 TeV", JHEP 1504 (2015) 124, DOI:10.1007/JHEP04(2015)124, e-Print: arXiv:1502.06031

This publication contains the most interesting indication of New Physics found by CMS. The work was performed as a collaboration among ETHZ, UCSD, and RWTH. I led the effort and presented the final results to the CMS collaboration in 2014. The PhD. student I supervised published these results in his thesis.

2012

CMS Collaboration (Serguie Chatrchyan et al.), "Search for physics beyond the standard model in events with a Z boson, jets, and missing transverse energy in pp collisions at sqrt(s)=7 TeV", Phys.Lett. B716 (2012) 260-284, DOI:10.1016/j.physletb.2012.08.026, e-Print:arXiv:1204.3774

This search was developed by a collaboration including ETH, UCSD, UCSB and Fermilab. I co-led with two other ETH Post-docs the development of a novel method called Jet-Z Balance to predict the amount of Drell-Yan background. I was selected to present these results in ICHEP12.

2012

CMS Collaboration (S. Chatrchyan et al.), "Search for Supersymmetry in hadronic final states using MT2 in pp collisions at sqrt(s) = 7 TeV", JHEP 1210 (2012) 018, DOI:10.1007/JHEEP10(2012)018, e-Print:arXiv:1207.1798

This analysis was developed by the ETH group where I collaborated with other Post-docs and students. I contributed actively to the development of the ~@~\lost-lepton method~@~] to pree dict the amount of W+jets and top pair production backgrounds.

2010

CMS Collaboration (S. Chatrchyan et al.), "Alignment of the CMS Muon System with Cosmic-Ray and Beam-Halo Muons", JINST 5 (2010) T03020, DOI:10.1088/1748-0221/5/03/T03020, e-Print:arXiv:0911.4022

In this paper the techniques and the results of the first alignment of the CMS muon system with muon tracks are presented. I developed the techniques (with the exception of the Beam-Halo alignment) and results that provided the first aligned geometries of the muon system of CMS.

2008

CMS Collaboration (S. Chatrchyan et al.), "The CMS experiment at the CERN LHC", JINST 3 (2008) S08004, DOI:10.1088/1748-0221/3/08/S08004

This paper provides a technical description of CMS, summarizing the CMS Technical Design Report that contains the foundations of the detector. I made major contributions in the set-up of the procedures to align the muon system. (An extended version was included in an 8-page contribution in the CMS TDR).


Proceedings and talks in major international conferences
2017

P. Martinez, "Searches for BSM physics in the 2 leptons y MET final state"

Parallel given at IX CPAN days: IX CPAN days, Centro Nacional de Partículas, Astropartículas y Nuclear, 23-25 Oct 2017, CPAN, Santander (Spain)

2016

P. Martinez, "Review of Supersymmetry Searches at 13 TeV with the CMS experiment"

Plenary given at DM2016: Dark Matter 2016: From the smallest to the largest scales, 27 Jun-1 Jul 2016, Santander (Spain)

2014

P. Martinez, "Search for beyond the Standard Model Physics in Multi-Leptonic and photonic final states with the CMS detector"

ICHEP 2014: 37th International Conference on High Energy Physics, 2014, Valencia, Spain. (Proceedings accepted for publication)

2012

P. Martinez, "Searches for SUSY events with two or more leptons at CMS"

ICHEP 2012: 36th International Conference on High Energy Physics, 2012, Melbourne, Australia, Spain. PoS ICHEP2012 (2013) 132, Conference:C12-07-04, Proceedings

2010

P. Martinez, "Commissioning and performance of the CMS detector"

22nd Rencontres de Blois on Particle Physics and Cosmology: First results from the LHC, 2010, Blois, France.

2010

P. Martinez, "The CMS Muon Alignment"

CHEP09: 17th International Conference on Computing in High Energy Physics, 2010, Prague, Czech Republic. Journal of Physics: Conference Series 219 (2010) 022014 DOI:10.1088/1742-6596/219/2/022014

2009

M. Sobron, P. Martinez "CMS Muon Alignment: System description and first results"

The 10th International Conference on Instrumentation for colliding Beam Physics, 2008, Novosibbirsk, Rusia. Nucl.Instrum.Meth. A598 (2009) 187-191, DOI:10.1016/j.nima.2008.08.101, Proceedings

2008

P. Martinez et al., "A software and computing prototype for CMS Muon System Alignment"

CHEP07: 16th International Conference on Computing in High Energy Physics, 2007, Victoriaa, Canada. Poster. J.Phys.Conf.Ser. 119 (2008) 072008, DOI:10.1088/1742-6596/119/7/072008, Proceedings


Seminars, lectures and presentations in important internal meetings
2016

The LHC Seminar "CMS SUSY searches at 13 TeV"

I was invited to give the prestigious CERN-LHC Seminar at CERN presenting the first CMS SUSY results at 13 TeV with the data taken during the year 2015.

Check the video

2015

SUSY plenary talk in the "CMS Week"

I was selected to present the summary of the SUSY results of CMS from the first data-taking of 2015 in the all-together internal meeting off the collaboration.

2015

Seminar: "Searches for SUSY with two opposite-sign same flavor leptons: the Edge"

Seminar at the University of Zurich

2014

"The CMS Supersymmetry trigger strategy"

Trigger workshop in Strasbourg. Talk as convener of the Trigger, Monte Carlo and Interpretations group.

2012

Plenary talk in the "Lisbon CMS Week"

I was selected to show the general status of the CMS software migration in the all-together internal meeting of the collaboration

2015

Invited lectured at DESY: Muon Alignment in CMS and ATLAS

Invited by the German Helmholtz Alliance.


Prizes and Awards
2012

Premio Extraordinario a la mejor tesis en Ciencia (Best PhD. Thesis on Science)

The University of Cantabria awarded me in 2010 with this prize to the best PhD. thesis on Science in the year 2010.

2010

CMS Achievement Award

An international committee of the CMS collaboration awarded me in 2010 with this prize to the most outstanding contributions to the CMS Collaboration. The award was given for my work on the muon alignment system. This prize is given every year to approximately 10 persons of the CMS Collaboration, out of a total of approximately 3000 members.

2005

Premio Extraordinario de fin de carrera (Best academic performance)

The University of Cantabria awarded me in 2005 with this prize to the best academic performance. This award is given every year to the undergraduate student with the best grades of the University


Technology transfer and industry
2015

Co-founder of Muon Tomography Systems S.L.

This company based on Barakaldo, Spain, developes Muon Tomography (Muography) to the preventive maintenance of industrial equipment. I am co-founder of the company and was involved in the development of the Muon detectors and also in the image reconstruction algorithms. The company has been awarded with several awards and attracted funding from several public and private institutions.

Check the web page of the company


Outreach activities
2018

Pint of Science “Universo extranyo, mentes creativas”

I gave this talk in Santander, Spain, in the context of the Pint of Science event. There were more than 50 people attending the talk.

2018

Fundacion Aquae “Las nubes de la Fisica”

I gave this talk in Ourense Spain, in the context of the Aquae Talent Hub event. There were more than 150 people attending the talk.

Check the info here.

2017

Fundacion Aquae “Materia oscura: la gravedad de lo invisible”

I gave this talk in Cartagena Spain, in the context of the Aquae Campus. There were more than 200 people attending the talk and the event was trending topic in Spain.

Check the video here.