This page was thrown together quickly to provide some info about what we are doing these days. As an aside, the page with info on the UCSD written exam is here.

At this point, we are recruiting:

• undergraduates
• graduate students

Some press releases

• Radio Interview
• CMS Data processing at SDSC
• The Prism networking grant
• OSG in Natural Sciences newsletter
• Higgs in Natural Sciences newsletter
• interview on Miha's blog

CMS

This is where the focus is going now. Between 2004-2007, our focus was primarily on CMS computing, while doing physics only on CDF, where there was data. As we got closer to LHC data taking this has changed.

Professors Yagil and Wuerthwein work closely with Claudio Campagnari's group at UCSB, and Kevin Burkett and Lothar Bauerdick's group at FNAL. At UCSD, our physics effort includes 5 graduate students, 5 post-docs, and two faculty as of February 2012.

CMS physics publications from our group on the 2012 data

At this point we have the following public results out.

• Higgs discovery paper PLB 716 (2012) 30 and its citation index. Our contribution is the HWW mode in 2l2nu.
• Final HWW paper JHEP 01 (2014) 096 and its citation index on arXive.
• WW cross section with only part of the 8TeV dataset arXive:1301.4698 PLB 721, 190 (2013) and citation index
• WW cross section with the full 8TeV dataset yet to come.
• "Study of vector boson scattering and search for new physics in events with two same-sign leptons and two jets" (same-sign WW VBF paper) arXive:1410.6315
• same-sign susy with btags arXive:1212.6194 JHEP03(2013)037 and citation index
  • same but updated with the full dataset and expanded in the range of final states and interpretations JHEP 01 (2014) 163arXiv:1311.6736 and citations
• stop pair search EPJC 73 (2013) 2677 and citation index and the actual journal reference is here
• Searches for electroweak production of charginos, neutralinos, and sleptons decaying to leptons and W, Z, and Higgs bosons in pp collisions at 8 TeV arXive for paper combining SUS-13-006 and SUS-13-017. EPJC 74 (2014) 3036 citation index.
• Searches for electroweak neutralino and chargino production in channels with Higgs, Z, and W bosons in pp collisions at 8 TeV? Phys. Rev. D 90 (2014) 092007, and citation record from inspire
• Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at sqrt(s) = 8 TeV? arXive:1405.3886. Published as PLB 736 (2014) 371 with citation record.
• Measurement of top quark-antiquark pair production in association with a W or Z boson in pp collisions at sqrt(s) = 8 TeV? arXive:1406.7830 and its citation index, published in EPJC 74 (2014) 3060.
• two top asymmetries papers

CMS physics publications from our group on the 2011 data

The total integrated luminosity in 2011 was 4.7/fb as compared to 0.036/fb in 2010. The 2011 data taking period thus saw more than a x100 increase in luminosity. As of February 2012, the analyses are coming out of the approval process one after the other. We expect them to become public by mid march. I'll add in the links to the preprints as they become public.

• Higgs Searches
  • Higgs to WW to lnu lnu PLB 710 (2012) 91
  • Higgs to ZZ to ll nunu JHEP 03 (2012) 040
• Measurement of the W+W- cross section in pp collisions at sqrt(s) = 7 TeV? and limits on anomalous WW gamma and WWZ couplings (Eur. Phys. J. C 73 (2013) 2610)
• Searches for new physics:
  • tprime (search for a high mass sibling of the top quark) is published in PLB 716, 103 (2012)
  • Supersymmetry in the Z + MET + jets final state is published in PLB 716 (2012) 260
  • Supersymmetry in the opposite sign dilepton final state is published PLB 718 (2013) 815
  • Supersymmetry in the same sign dilepton plus 2 btags final state (search for stop, sbottom from gluino decay, and sbottom pair production, same sign top) is published in JHEP08(2012)110
    • This also includes same sign top search update of the 2010 analysis, i.e. the one motivated by the top Afb anomaly in CDF.
  • Supersymmetry in the same sign dilepton final state is now published PRL 109 (2012) 071803.
  • Search for Supersymmetry in the WZ + MET and ZZ + MET final state JHEP 11 (2012) 147
  • 7TeV top Spin correlations and polarization and its citation index
  • as well as the 7TeV top charge asymmetry and it's citation index.

CMS physics publications from our group on the 2010 data

During the first year (2010) of data taking with the LHC, our focus is on physics with dileptons. This lead to the following publications:

• First measurement of top pair production at the LHC: http://arxiv.org/abs/1010.5994 PLB 695 (2011) 424
• Measurement of the WW cross section: http://arxiv.org/abs/1102.5429 PLB 699 (2011) 25
• Search for new physics with opposite sign dileptons plus jets and met: http://arxiv.org/abs/1103.1348 JHEP 6 (2011) 26
• Search for new physics with same-sign dileptons plus jets and met: http://arxiv.org/abs/1104.3168 JHEP 1106:077,2011
• Measurement of top pair cross section with the full 2010 dataset: http://arxiv.org/abs/1105.5661 JHEP 07 (2011) 049
• Search for same-sign top pair production: http://arxiv.org/abs/1106.2142 JHEP 8 (2011) 5

CMS Software & Computing

People active on CMS software and computing:

• Warren Andrews (graduate - graduated Summer 2012)
• Ian McNeil? (graduate)
• Vince Welke (graduate)
• Daniel Klein (graduate)
• William Fedus (graduate)
• Edgar Fajardo Hernandez (Software & Computing Staff)
• Dmytro Kovalskyi (Researcher)
• James Letts (Researcher)
• Terrence Martin (Software & Computing Staff)
• Sanjay Padhi (Researcher)
• Haifeng Pi (Researcher - left for Qualcom Fall 2012)
• Brendan Dennis (Software & Computing Staff)
• Jeff Dost (Software & Computing Staff)
• Tim Mortensen (Software & Computing Staff - left 2013)
• Matthew Norman (Researcher - left for Ebay)
• Bruce Thayre (Software & Computing Staff - left for SIO)
• Alex Georges (Software & Computing Staff - left for graduate school in Physics)
• Igor Sfiligoi (Software & Computing Staff - left for Industry)
• Alya Tadel (Software & Computing Staff)
• Matevz Tadel (Researcher)
• Frank Wuerthwein (faculty)
• Avi Yagil (faculty)

• This twiki is hosted by the Tier-2 at UCSD.
• Global Computing Commissioning
• Debugging Data Transfers Task Force
  • Direct link to DDT

Publications on Computing by people in our group

• CHEP 2009, Journal of Physics: Conference Series 219
  • Use of glide-ins in CMS for production and analysis (also CMS CR-2009/081)
  • A Grid Job Monitoring System
  • CREAM-CE: First experiences, results and requirements of the 4 LHC experiments
  • The commissioning of CMS sites: improving site reliability
  • Bringing the CMS Distributed Computing System into Scalable Operations
  • Pseudo-interactive monitoring in distributed computing
  • Flexible Session Management in a Distributed System
  • Scalability and interoperability within glideinWMS
  • SVOPME: A Scalable Virtual Organization Privileges Management Environment
  • CDF software distribution on Grid using Parrot
  • CDF GlideinWMS? usage in Grid computing in High Energy Physics
• CHEP2010, Journal of Physics: Conference Series 331
  • An Update on the scalability limits of the Condor batch system
  • Early Experiences on using glideinWMS in the Cloud
  • Scalability of Network Facing Services used in the Open Science Grid
  • CMS Distributed Computing Integration in the LHC sustained operations era
  • Large Scale commissioning and operational experience with tier-2 to tier-2 data transfer links in CMS
  • Operating a production pilot factory serving several scientific domains
  • Event Display for the Visualization of CMS Events
  • Measuring and understanding computer resource utilization in CMS
  • High Throughput WAN Data Transfer with Hadoop-based Storage
• CHEP2012, Journal of Physics: Conference Series 396
  • glideinWMS experience with glexec
  • Controlled overflowing of data-intensive jobs from oversubscribed sites
  • The benefits and challenges of sharing glidein factory operations across nine time zones between OSG and CMS
  • Evolution of the Distributed Computing Model of the CMS experiment at the LHC
  • Using Xrootd to Federate Regional Storage
  • Xrootd Monitoring for the CMS Experiment
  • The above is a partial list
• CHEP2013, Journal of Physics: Conference Series 513
  • Minimizing draining waste through extending the lifetime of pilot jobs in Grid environments ( presentation )
  • Using ssh as portal – The CMS CRAB over glideinWMS experience ( presentation )
  • CMS experience of running glideinWMS in High Availability mode
  • Estimating job runtime for CMS analysis jobs
  • Using ssh and sshfs to virtualize Grid job submission with RCondor
  • Cloud Bursting with GlideinWMS: Means to satisfy ever increasing computing needs for Scientific Workflows ( presentation )
  • Performance of popular open source databases for HEP related computing problems
  • Accessing opportunistic resources with Bosco
• The CMS experiment at the CERN LHC ( 2008 JINST 3 S08004 )
• The commissioning of CMS computing centres in the worldwide LHC comuting Grid (Nuclear Science Symposium Conference Record 2008, NSS '08 IEEE)
• The commissioning of CMS computing centres in the WLCG Grid (ACAT 08, 043, XII Advanced Computing and Analysis Techniques in Physics Research 2008, Erice, Italy) (EGEE-08, Istanbul, Sept. 22-26, 2008)
• Definition and Implementation of a SAML-XACML Profile for Authorization Interoperability across Grid Middleware in OSG and EGEE (Journal of Grid Computing)
• Pilot Job Accounting and Auditing in Open Science Grid (IEEE Grid 2008
• The pilot way to Grid resources using glideinWMS (CSIE 09)
• Reducing the Human Cost of Grid Computing With glideinWMS (Cloud Computing 2011, Paper, Presentation)
• Adapting to the Unknown With a few Simple Rules: The glideinWMS Experience (Adaptive 2011, Paper, Presentation) - Best paper award
• The glideinWMS approach to the ownership of system images in the Cloud world (CLOSER 2012, Presentation, paper doi:10.5220/0003961904430447 )
• Published paper on CMS distributed analysis can be found here.

Non-physics computing

Our standard acknowledgements

The computational resources required for this work were accessed via the GlideinWMS? \citep{Sfiligoi2009} on the Open Science Grid \citep{Pordes2008}.

[Sfiligoi2009] Sfiligoi, I., Bradley, D. C., Holzman, B., Mhashilkar, P., Padhi, S. and Wurthwein, F. (2009). "The Pilot Way to Grid Resources Using glideinWMS", 2009 WRI World Congress on Computer Science and Information Engineering, Vol. 2, pp. 428–432. doi:10.1109/CSIE.2009.950.

[Pordes2008] Pordes, R. et al. (2007). "The open science grid", J. Phys. Conf. Ser. 78, 012057. doi:10.1088/1742-6596/78/1/012057.

Some of the science publications that cite or acknowledge use of our computing infrastructure

• A set of slides Igor presented on the science these people do.
• General talk on science on OSG other than HEP (OSG AHM 2012).
• Astrophysics:
  • Higher Order Gravitational Lensing Reconstruction Using Feynman Diagrams
  • Gravitational Lensing of the CMB: a Feynman Diagram Approach
  • The Topology and Size of the Universe from the Cosmic Microwave Background published as JCAP 06 (2012) 003
  • Analyzing WMAP data to produce a gravitational lensing map to do cosmology published in PRD.
  • Evidence for Gravitational Lensing of the CMB (POLARBEAR Collaboration)
  • Gravitational Lensing of CMB Polarization (POLARBEAR Collaboration)
• Climate Science
  • Study of Clouds in long term weather patterns in the Arctic published in "Journal of Climate".
• Engineering Education:
  • SpeedSeg: A technique for segmenting pen strokes using pen speed published in "Computers & Graphics".
• Protein Data Base related
  • The RCSB Protein Data Bank: new resources for research and education published in "Nucleic Acids Research".

Open Science Grid Computing

Our group is heavily involved in the Open Science Grid (OSG), a nationwide distributed computing effort aimed at providing Grid computing to the scietific community.

CMS heavily relies on OSG for its computing needs, so a lot of effort is shared between the two.

In this section we present only information that is OSG specific and may not have direct, short term use in CMS.

Roles in OSG:

• Member of the Executive Team (Frank Wuerthwein)

Major subtasks:

• Running a glideinWMS factory for OSG (Jeffrey Dost, Brendan Dennis)
• OSG Software group (Edgar Fajardo)

While OSG usually does not develop software, the OSG scalability etc. work required tools that were not readily available, so new tools have to be developped.

The tools are hosted on sourceforge at http://sourceforge.net/projects/osgscal/.

Publications:

• Using Condor glideins for distributed testing of network-facing services (IWHGA2010 - Preprint)

CorralWMS

Our group was also involved in the development of Grid Workload Management Systems (WMS). This project ended in 2013.

The R&D effort was oriented toward the development of CorralWMS, an integration of glideinWMS and Corral. The effort was a collaboration of UCSD, Fermilab and ISI.

People that contributed to CorralWMS? :

• Alison McCrea? (undergraduate)
• Miguel Alatorre (undergraduate)
• Eli Moskowitz (undergraduate)
• Ian McNeil? (graduate)
• Igor Sfiligoi (Computing Staff)
• Frank Wuerthwein (faculty)
• Amir Eibagi (undergraduate)
• Benjamin Christian Boynton (undergraduate)
• Chris Murphy (graduate)
• Jaehyeok Yoo (graduate)
• Tim Kang (undergraduate)
• Tony Myers (undergraduate)
• Robert Chen (undergraduate)
• Eliskhan Sheripon (undergraduate)

JavascriptRRD?

Our group has developped, and is maintaining, a Javascript-based library for reading an plotting RRD databases.

The package is hosted on sourceforge at http://sourceforge.net/projects/javascriptrrd/.

It is currently being used in glideinWMS and CorralWMS? (see above).

People involved from our group:

• Alison McCrea? (undergraduate)
• Igor Sfiligoi (Computing Staff)
• Frank Wuerthwein (Faculty)

Advanced Network and Distributed Storage Laboratory

• Haifeng Pi (Researcher)
• Igor Sfiligoi (Computing Staff)
• Frank Wuerthwein (Faculty)

Physics with CDF

• Rami Vanguri (former undergraduate, now graduate @ UPenn)
• Shih-Chieh Hsu (former graduate student, now Chamberlain Fellowship to work on Atlas at Berkeley since May 2008)
• Matt Norman (former graduate student, left for Ebay)
• Elliot Lipeles (former post-doc, starting faculty job at UPenn on June 1st 2008)
• Mark Neubauer (former post-doc. Faculty at UIUC since Fall 2007)
• fkw (faculty)

Bottom line, the CDF effort ended in 2010.

Public CDF Results from UCSD

• WZ production
  • 2fb update of cross section
  • 2fb Triple gauge couplings - heading for publication now
  • PRL of "First Observation of WZ"
    • The actual PRL publication is here.
• ZZ production
  • First Measurement of ZZ at a hadron collider Phys.Rev.Lett.100:201801,2008
  • 2fb Triple gauge couplings in lljj
• Higgs search
  • 2fb result (Shih-Chieh's thesis)
  • PRL 102 (2009) 021802
• Triple gauge couplings in WW in the lnulnu final state.
• Lambda_b lifetime
  • Measurement of the Lambda_b Lifetime in Lambda_b --> J/psi Lambda0 in p-pbar Collisions at sqrt(s)=1.96 TeV Phys.Rev.Lett.98:122001,2007

Ancient Topcite Publications from my CLEO days

• Observation of B0 decay to two charmless mesons Phys. Rev. Lett. 71, 3922–3926 (1993)
• Observation of B→K±π0 and B→K0π0, and Evidence for B→π+π- Physical Review Letters 85, 515 (2000)
• Measurement of Charge Asymmetries in Charmless Hadronic in B Meson Decays Phys.Rev.Lett.85:525-529,2000
• Search for Exclusive Charmless Hadronic B Decays Physical Review D 53, 1039 (1996)

-- FkW - 2010/04/16 -- FkW - 4 March 2010