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Office of Educational Programs, 2008 Summer Internship Symposium and Poster Session (open access)

Office of Educational Programs, 2008 Summer Internship Symposium and Poster Session

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Date: August 13, 2008
Creator: White,K.; Morris, M.; Osiecki, C. & Blackburn, N.
System: The UNT Digital Library
Measurement of \mathcal{B}(\tau^{-}\-->\bar{K^{0}}\pi^{-}\nu_{\tau}) Using the \babar Detector (open access)

Measurement of \mathcal{B}(\tau^{-}\-->\bar{K^{0}}\pi^{-}\nu_{\tau}) Using the \babar Detector

A preliminary measurement of the branching fraction {Beta}({tau}{sup -} {yields} K{sub S}{sup 0}{pi}{sup -}{nu}{sub {tau}}) is made using 384.6 fb{sup -1} of e{sup +}e{sup -} collision data provided by the PEP-II collider, operating primarily at {radical}s = 10.58 GeV, and recorded using the BABAR detector. From this they measure: {Beta}({tau}{sup -} {yields} {bar K}{sup 0}{pi}{sup -}{nu}{sub {tau}}) = (0.840 {+-} 0.004(stat) {+-} 0.023(syst))%. This result is the most precise measurement to date and is consistent with the world average.
Date: August 13, 2008
Creator: Wren, A
System: The UNT Digital Library
Observation of B0 -> chi_c0 K*0 and Evidence of B+ -> chi_c0 K*+ (open access)

Observation of B0 -> chi_c0 K*0 and Evidence of B+ -> chi_c0 K*+

The authors present the observation of the decay B{sup 0} {yields} {chi}{sub c0}K*{sup 0} as well as evidence of B{sup +} {yields} {chi}{sub c0}K*{sup +}, with an 8.9 and a 3.6 standard deviation significance, respectively, using a data sample of 454 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II B meson factory located at the Standard Linear Accelerator Center (SLAC). The measured branching fractions are: {Beta}(B{sup 0} {yields} {chi}{sub c0}K*{sup 0}) = (1.7 {+-} 0.3 {+-} 0.2) x 10{sup -4} and {Beta}(B{sup +} {yields} {chi}{sub c0}K*{sup +}) = (1.4 {+-} 0.5 {+-} 0.2) x 10{sup -4}, where the first quoted errors are statistical and the second are systematic. They obtain a branching fraction upper limit of {Beta}(B{sup +} {yields} {chi}{sub c0}K*{sup +}) < 2.1 x 10{sup -4} at the 90% confidence level.
Date: August 13, 2008
Creator: Aubert, B.
System: The UNT Digital Library
Comparisons of HVAC Simulations between EnergyPlus and DOE-2.2 for Data Centers (open access)

Comparisons of HVAC Simulations between EnergyPlus and DOE-2.2 for Data Centers

This paper compares HVAC simulations between EnergyPlus and DOE-2.2 for data centers. The HVAC systems studied in the paper are packaged direct expansion air-cooled single zone systems with and without air economizer. Four climate zones are chosen for the study - San Francisco, Miami, Chicago, and Phoenix. EnergyPlus version 2.1 and DOE-2.2 version 45 are used in the annual energy simulations. The annual cooling electric consumption calculated by EnergyPlus and DOE-2.2 are reasonablely matched within a range of -0.4percent to 8.6percent. The paper also discusses sources of differences beween EnergyPlus and DOE-2.2 runs including cooling coil algorithm, performance curves, and important energy model inputs.
Date: August 13, 2008
Creator: Hong, Tianzhen; Sartor, Dale; Mathew, Paul & Yazdanian, Mehry
System: The UNT Digital Library