Toward the End of PhD Career at the LPC: How does the LPC help me grow as a student

and beyond?

Tutanon SinthuprasithBrown University

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LPC10 Mini-Symposium

17th July 2014

Introduction

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About myself:

• PhD Candidate at Brown University • PhD career path

Brown University CERN the LHC Physics Center (LPC)

PhD Career Path

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• CERN • Service: Hadronic Calorimeter

• L1 Trigger• Hcal Data Validation• Hcal Operation

• Analyses:• New physics in 4-jet final state: not published (superseded)• New physics in 8-jet final state (main contribution, also at

the LPC)• Microscopic blackhole (partial contribution, also at the LPC)

PhD Career Path

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• LPC• Offline data certification shift supervisor at LPC ROC• Analyses

• New physics in 8-jet final state at 7 TeV (main contribution, EXO-11-075 PAS publication)

• Microscopic blackhole (partial contribution, JHEP 04 (2012) 061, JHEP 07 (2013) 178 led by Alexey Ferapotov, LPC Distinguished Researcher)

• New physics in 8- and 10-jet final state at 8 TeV (lead the analysis, EXO-13-001, Pre-approval stage)

LPC Brown CERN

Group members 1/3 1/3 1/3

Experts in my topic of interest Yes Yes, but limited Yes

Connection to theorists and community

Yes No Yes, but harder to access

LHC Operation involvement

Yes, but limited through ROC No Yes

Brown University and the LPC

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Brown’s history with the LPC:• Brown joined CMS in 2004 and has had a close collaboration with the LPC since

then• Leadership

• Current LPC co-cooridnator: Meenakshi Narain• Current LPC management board: Greg Landsberg• Current ToTW co-chair: Alexey Ferap`ontov• Past CMS/US CMS physics coordinator: Greg Landsberg• Past LPC Trigger group convener: Greg Landsberg• Past LPC Physics Forum co-chair: Greg Landsberg• Past LPC dilepton convener: Meenakshi Narain• Past LPC management board and selection committee: Greg Landsberg• Past CMS statistical committee: Ulrich Heintz, Gena Kukartsov• Past CMS statistics/analysis tools: Gena Kukartsov • Past Jet/MET Trigger convener: Shabnam Jabeen• Past ToTW co-chair: John Paul Chou

• Recognition• LPC Senior/Junior Distinguished Researchers (LPC-DR)

• Currently affiliated with Brown: Greg Landsberg (2014), Meenakshi Narain (2012), Alexey Ferapontov (2012/2014)

• Affiliated with Brown in the past: Gena Kukartsev (2012), John Paul Chou (2011), Aram Avetisyan (2013), Shabnam Jabeen (2012)

• Awardees for LPC Guests & Visitor Program: Sinan Sagir, Alex Garabedian, Joshua Swanson

Brown University and the LPC

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Brown’s history with the LPC: The LPC and Brown have been collaborating on both detector and performances, and physics analyses. Here is the selected short list in the area, in which the LPC directly or indirectly helps us achieve our goals.

• Detector and performance• Silicon Tracker• Hadron Calorimeter and Trigger• Tracking and Trigger Performance• Jet/MET Physics Object• b-Tagging Algorithm Development• MC simulation

• Researches and topics of interest• Top quark physics and electroweak interaction• New physics:

• Heavy gauge boson W’ Z’ • Fourth generation quarks/Vector-like quarks• Extra dimension• Multijet final states: Blackhole, Axigluon/Coloron, RPV SUSY• Long-lived particle, delayed muons• Stealth SUSY• …

The LHC Physics Center

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How does LPC help me grow as a PhD student in high energy physics?

LPC: Learning Center: •Hands-on Tutorials – Stats/Jet substructure •Analysis School

LPC: New analyses ideas and/or techniques are initiated and developed: •Topic of the Week - RPV SUSY. Accidental Substructure•Physics Forum

LPC: Computing Help Desks/Users Facility:•Storage space and LPC computer clusters/lpc-howto•Minor technical problems – lpc-howto, talk to people

Physics Analyses

LPC: Physics Discussions/Comments/Reviews: Theorists/Conveners/ARC

Publications

Physics Outputs

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Search for New Physics in 8-jet final state at 7 TeV

Search for New Physics in 8- and 10-jet Analysis at 8 TeV

EXO-11-075 EXO-13-001

Preliminary

Summary

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As a PhD student who stationed at the LPC, I greatly benefited from:

1. A thorough aspects of physics analysis ranges from• Initial state of learning physics and what tools to be utilized

• hands-on tutorial (HATS)• initiate the ideas/techniques (Topics of the Weeks/Physics

Forums/Seminars/Workshops)• discuss the plausibility/goal of the analysis with leading

theorists• Analyzing – final state of the analysis

• utilize LPC storage space, and LPC computer cluster• take advantage of available expertise at the LPC• discuss about and obtain comments on physics results,

strengths and weaknesses of the analysis, etc from conveners/ARC/theorists at LPC

Summary

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2. An atmosphere which encourages us to work and deliver the results in a timely manner.

3. A sense of particle physics community at the LPC

As a physicist and beyond, I greatly benefited from:

1. A bigger picture of particle physics and cosmology in general – not limited to LHC physics

2. Where we, as a whole community, stand, and in which direction we are progressing towards. And where I am standing

3. What other factors that we need to consider beside physics in large organization, e.g., budget trends, connections, jobs in the field.

4. Broaden my horizon: perspectives from graduate student fellows, postdocs, scientists and faculties

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Back up

The LHC Physics Center

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LPC is a hub for physics discussions with experimental experts as well as leading theorists

Learning Center

Tools CMS Data Analysis SchoolsCMS Hands-on Tutorial Sessions

(HATS):• Jet substructure HATS • Statistics HATSFNAL Software School (broader

community to be held in August)Many seminars/workshops: • Introduction to advanced statistics

for CMS Analyzers• CTEQ&LPC workshop

• SUSY at the near frontier

LPC Topic of the Week• “LHC searches examined via the

RPV MSSM: Gluinos”, Evgeny Kats/Jared Evans “Toward Full LHC Coverage of

Natural Suspersymmetry” arXiv:1310.5758v1

• “Jet substructure by accident”, Tim Cohen“Jet substructure by accident” arXiv:1212.1456

LPC Physics ForumPrivate discussions

Analyses’ ideas and techniques

LPC offers sequences of important learning sessions in both physics and the “tools” to carry on the physics analyses

The LHC Physics Center

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Minor technical problems:• lpc-howto mailing list, e.g., missing data/transfer samples/minor

computing glitches/jobs submissions • Talk to experts in person at the LPC

LPC facility:• Storage space allocation for analyses’ groups and projects (lpcmj)

8- and 10-jet analysis has all samples (including high jet multiplicity background) privately produced and stored at the LPC

Private Physics Discussion/Comments/Reviews:• Fruitful discussions and advices from experts

• Closely reviewed by EXO Convener (John Paul Chou)• Suggestions from pythia author (Stephen Mrenna)• Analysis Review Committee (Robert Harris)

Computing Help Desk and Users Facility

Physics Discussions/Comments/Reviews