TABLE OF CONTENTS Face Page (DOE F 4650.2) OER Grant Application Budget Summary (DOE F 4620.1) Grant Application Project Peiiod Summary (ER F 4650.1A) Current and Pending Support Table of Contents Project Description Budget Justification Publications since January, 1998 Talks since January, 1998

Biographical Sketches and Publications Notice of Energy RD&D Project (DOE F 1430.22)

Assurance of Compliance (DOE F 1600.5) Appendices I. Budget Spreadsheets I.

m. "University Computing for Bal3ar"

1998 External Reviews of UTD's DOE Proposal

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p 0 f / i q 4 0 Project Description

9 A S - - 7 /

BABAR (Izen, Lou, Turcotte, Benninger, Cooke, Marsh, Borawski) The BABAR construction phase is ending and first data is expected during May, 1999. The During construction, UTD has developed analysis framework software, contributed to the BABAR Physics Book, assembled a first rate computing facility, and pioneered Internet-based video techniques for the collaboration. We are now defining our physics goals, and are participating in the formation physics analysis groups. We are starting to use our computing facility for BABAR production jobs. Contributions to the BA BA R Offline Framework Dr. Marc Turcotte completed his term as Framework Package Coordinator from his base at UTD. His duties included maintaining the Framework and extending its functionality. The AppActions and their associated command dialogue were designed and implemented successfully. The Framework has been designed in collaboration with two other experiments, CDF and CLEO. BaBar inherited the design of event frames from CLEO and Marc implemented a BaBar version called AppFrame. This software now permits dynamic dispatch on flexible bindings to AppStopType objects. This new technology removes essentially all of the hardwiring in the Framework dispatch engine, making it generic and much more powerful. The code and design sharing exercise with CDF and CLEO continued successfully throughout the year with two productive, multi-experiment workshops at LBNL and Fermilab. This work was reported at CHEP'98. The BaBar and CDF Framework code repositories have been merged. The experiments have negotiated an improved AppModule interface, and BaBar has completed a lengthy, complex migration of its entire code repository to adhere to the new hterface. Another major UTD contribution to the Framework was the successful integration of a TCLbased GUI interface. The development work on this GUI is now continuing at CDF. Throughout this period, Marc fixed whatever bugs surfaced, and made changes as necessary as other packages that work with the Framework evolved. Contributions to the BABAR Phvsics Book J. Izen served as a convener of the BABAR non-U working group and co-editor of chapter 11 of the BABAR Physics Book devoted to these studies. In addition to organizational work to assure that all standard topics were addressed, Izen explored more Speculative areas. Research assistant J.H. Cooke and he investigated B," tagging at the T(5S), and Izen carried out a study of radiative T(4S) decays. Radiative T(4S) decays are highly suppressed for the Y(4S) since this state is above the threshold for strong decays to B mesons. Izen's phenomenological estimate of the rate for radiative T(4S) decays suggests BABAR'S T(4S) sample will be large enough to observe the 3P and 20 states for the first time. ken demonstrated that the BABAR CsI calorimeter's energy resolution will easily resolve the spectroscopic structure of the photon cascades between these states. Decays of B: mesons are as interesting as the decays of Bo. The off-diagonal elements of the mass matrix which lead to mixing and to CP violation are larger, but producing and reconstructing B," mesons is far more difficult. According to the Unitarized Quark Model, the largest B," production cross section occurs at the Y(5S). Unfortunately, the Y(5S) cross section is small, and the production mechanism is complicated because the Y(5S) is expected to decay predominately to B:' mesons. Cooke and Izen set out to overcome these difficulties using an efficient partial reconstruction technique to tag the decay B,"' -3 yB,", B," + yq. Instead, they found a large background from other 23,"' decays. However, the very events that spoiled the

tag of B,O' 3 yB;, B," + yq could be exploited as an efficient tag for B,"', with reasonable rejectionof Bo* and B+* decays. X.C. Lou studied the feasibility of B lifetime measurements at BABAR for his contribution to the BABAR Physics Book. Measurements of B lifetimes pose an interesting challenge since the production vertex can not be directly reconstructed. Instead, lifetime information is extracted from the separation between the two reconstructed B vertices. Lou devised a procedure to calibrate the B lifetime measurement using exclusive D meson events Other Contributions BABAR has several subdetectors that help distinguish between charged particle species. It is especially important, for example to distinguish the decays Bo + n'n- and Bo + K'K-. hen co-authored a BABAR Note 422, "Some Statistics for Particle Identitication" which describes how to use optimally the information from each subdetector, and how to combine them where appropriate. hen drafted the crucial sections on probability density function, likelihood, consistency, and neural networks, and his choice of definition for consistency was adopted by the-entire collaboration. BABAR Note 422 is the reference upon which all BABAR particle identification software is based. Izen worked on two C++ programming projects during a year-long assignment at the KEX Laboratory in Japan. He demonstrated how to use lookup tables to reduce the execution speed of the Belle Aerogel Cerenkov Counter simulation, ACC++ by a factor of seven. This work was presented at the Belle Reconstruction meeting on January 22, 1998 and documented in Belle Note 206, "ACCelerating ACC++ With Lookup Tables". His second project was the development of a C++ shower library simulation of the Belle electromagnetic and hadronic calorimeters. A prototype package was developed for storing pregenerated showers for Belle, and then implanting them into simulated events. This package is being ported to the BABAR software environment, and further development is ongoing. The HEP group's BABAR computing strategy is based on UTD's 18-processor Sun Enterprise 6000 system (167 MHz, 9.37 SPECfp95 per processor). Approximately 30% of the E6000's priority cycles plus background cycles are available for HEP use. During the past year, X.C. Lou and research assistant Tracy Benninger have commissioned an ETL 4/1800 1.8Tbyte (uncompressed) mass storage system for the E6000. The BBTAPE driver software and user interface they developed will result in both upfront and recurring cost savings over commercial alternatives. BBTAPE will be made available to other BABAR groups, and UTD will undertake its maintenance. The HEP group has purchased an UltraSparc-Iii (12.8 SPECfp95) as a front end to the E6000 for job building and batch submission. This computing facility is among the strongest university-based facilities in BABAR. Research assistant Chip Cooke is responsible for maintaining the BABAR code libraries and binaries at UTD. We are currently preparing to participate in PRVO, BABAR'S first Monte Carlo production run predominantly for physics studies. During PRVO, the simulated events will be shipped to SLAC via magnetic tape. Eventually, we plan to write directly to BABAR'S Objectivity database federation at SLAC over the Internet. Our current Internet connection is marginal for accomplishing this at present, however Izen is co-principal investigator for a UTDKJT Arlington consortium infrastructure proposal to the NSF to support a high performance vBNS (very high performance Backbone Network Service) connection of at least 45 Mbps. Besides providing raw bandwidth for data transfer, vBNS will simplify computing at UTD since we will no longer need to maintain our own copies of code libraries.

BA BA R Proto-Phvsics GrouDS UTD has intially indicated interest in the D mixing Qzen), T spectroscopy (ken), baryonic B meson decay (Lou), and charm baryon spectroscopy (Lou).

In the last year, operational status of BES was restored, a preliminary R scan was completed, and construction has begun on a new drift chamber. X.C. Lou has been the US Physics Coordinator since June 1998. Six BES refereed publications appeared

+ z+z- Izen y' + ~ ' n ' , yqq Lou y' -+ Axialvector Pseudoscalar Lou y' + Baryon AntiBaryon Lou D+pX (semileptonic)

Publications in Refereed Journals Since January, 1998

1. y(2S) Hadronic Decays to Vector Tensor Final States. P E S Collaboration) J.Z. Bai, et al., (to be published in Physical Review Letters).

2. Evidence for the Leptonic Decay D + p v p (BES Collaboration) J.Z. Bai, et al., Physical Letters B429, 188 (1998).

3. Study of the P Wave Charmonium State xcJ in y (2s) Decays. (BES Collaboration) J.Z. Bai, et al., Physical Review Letters 81,3091 (1998).

4. Determination of J/I,v Leptonic Branching Fraction Via I,V ( 2 S ) + n 3 - ~ J / y . (BES Collaboration) J.Z. Bai, et al., Physical Review D 58 092006, (1998)

5. Branching Fractions for y (2S)+m' and m. (BES Collaboration) J.Z. Bai, et al., Physical Review D 58, 097101 (1998).

6. Search for ~ ~ ( 2 s ) Production in e+e- Annihilations a t 4.03 GeV. P E S Collaboration) J.Z. Bai etal., Physical Review D 57,3854 (1998).

7. Direct Measurement of the Branching Ratio Ds+ + $X+ (BES Collaboration) J.Z. Bai, et al., Physical Review D 57,28 (1998).

Submitted for Publication Since January, 1998

1. Charmonium Decays to Axial Vector Plus Pseudoscalar Mesons. P E S Collaboration) J.Z. Bai, et al, BIHEP-EP1-98-06, Jan 1999.

2. Study of the Hadronic Decays of x c States. (BES Collaboration) J.Z. Bai, et al., Physical Letters B429, 188 (1998).

Unrefereed Publications and Collaboration Notes Since January, 1998

1. The BABAR Physics Book. (BABAR Collaboration) D. Boutigny, et al., SLAC-Report-504, October, 1998

2. Some Statistics for Particle Identification. J.M. Izen, M. Sokoloff, A. Snyder, R. Waldi, BABAR Note 422, August 6, 1998

3. Accelerating ACC++ With Lookup Tables. J.M. Izen, Belle Note 206, January 22, 1998

Talks since January, 1998

The BABAR and Belle Experiments: How to measure CP violation in the decays of bottom mesons. J.M. Izen, Physics Colloquium, University of Texas at Dallas, September 23, 1998. The BABAR and Belle Experiments: How to measure CP violation in the decays of bottom mesons. Physics Colloquium, Sam Houston State University, Huntsville, Texas, September 17, 1998. Engineering a Shared Software Base Between High Energy Physics Experiments. (BABAR) R. Jacobsen, M.Turcotte , (CDF) E. Sexton-Kennedy, (CLEO) C. D. Jones, M.

Lohner, S. Patton, poster session, written version to be published in Proceedings of the Conference on Computing in High Energy Physics '98, httn://ww~.he~.ne~c/cheD98/PDF/l2.~df, Chicago, IL, Aug 31 - Sep 4, 1998. Status of the B Factory Detectors a t KEK and SLAC. Invited talk presented at the Monthly B Physics Theory Meeting, KEK Laboratory, Tsukuba, Japan, July 29, 1998 Tips for Success In a US Graduate Program. Invited speaker and panelist, Japan-U.S. Educational (Fulbright) Commission, Predeparture Orientation Program, Tokyo, Japan, May 13, 1998. Partial Reconstruction of Bi -3 B,y,B, -+ @y. J.H. Cooke, talk presented at the 1998 Joint Spring Meeting of the Texas Section of the American Physical Society, San Antonio, TX, March 19 - 21, 1998. Partial Reconstruction in B Physics. J.H. Cooke, talk presented at the 1998 Fall Meeting of the Texas Section of the American Physical Society, El Paso, TX, Oct 15 - 17, 1998. The Study of CP Violation with the BABAR Experiment at SLAC. J. Marsh, talk presented at the 1998 Fall Meeting of the Texas Section of the American Physical Society, El Paso, TX, Oct 15 - 17, 1998. A Measurement of B(D+@X) Using the Recoil Charge Technique. RD. Jones, talk presented at the 1998 Fall Meeting of the Texas Section of the American Physical Society, El Paso, TX, Oct 15 - 17, 1998. UT Dallas Offline Computing System for B Physics with theBABAR Experiment at SLAC. T.L. Benninger, talk presented at the 1998 Fall Meeting of the Texas Section of the American Physical Society, El Paso, TX, Oct 15 - 17,1998. BES Results on Inclusive D Meson Decays X.C. Lou, invited talk presented at 1999 Meeting of the Division of Particles and Fields of the American Physical Society, Los Angeles, January 5-9,1999.