Showing papers by "D. M. Asner published in 2006"
Southern Methodist University1, Syracuse University2, Vanderbilt University3, Wayne State University4, Carleton University5, Carnegie Mellon University6, University of Bonn7, University of Chicago8, Cornell University9, University of Florida10, George Mason University11, University of Illinois at Urbana–Champaign12, Indiana University13, University of Kansas14, Luther College15, University of Minnesota16, Northwestern University17, University at Albany, SUNY18, University of Oklahoma19, University of Pittsburgh20, University of Puerto Rico at Mayagüez21, Purdue University22, Rensselaer Polytechnic Institute23, University of Rochester24
TL;DR: In this paper, the CLEO detector operating at the CESR e+e- collider at 3.97-4.26 GeV was used to investigate 15 charmonium decay modes of the psi(4040), psi(4160), and Y(4260) resonances.
Abstract: Using data collected with the CLEO detector operating at the CESR e+e- collider at sqrt[s]=3.97-4.26 GeV, we investigate 15 charmonium decay modes of the psi(4040), psi(4160), and Y(4260) resonances. We confirm, at 11 sigma significance, the BABAR Y(4260)-->pi+pi- J/psi discovery, make the first observation of Y(4260)--> pi(0)pi(0) J/psi (5.1 sigma), and find the first evidence for Y(4260)-->K+K- J/psi(3.7 sigma). We measure e+e- cross sections at sqrt[s]=4.26 GeV as sigma(pi+pi- J/psi)=58(+12)(-10)+/-4 pb, sigma(pi(0)pi(0) J/psi)=23(+12)(-8)+/-1 pb, and sigma(K+K- J/psi)=9(+9)(-5)+/-1 pb, in which the uncertainties are statistical and systematic, respectively. Upper limits are placed on other decay rates from all three resonances.
166 citations
TL;DR: In this paper, a method for simultaneously measuring the magnitudes and phases of these amplitude ratios and searching for mixing pairs was presented, which can be used to estimate experimental sensitivities based on a plausible charm factory data set.
Abstract: Due to the presence of quantum correlations in the $C=\ensuremath{-}1$ and $C=+1$ ${D}^{0}{\overline{D}}^{0}$ pairs produced in the reactions ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}^{0}{\overline{D}}^{0}(n{\ensuremath{\pi}}^{0})$ and ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}^{0}{\overline{D}}^{0}\ensuremath{\gamma}(n{\ensuremath{\pi}}^{0})$, respectively, the time-integrated ${D}^{0}{\overline{D}}^{0}$ decay rates are sensitive to interference between amplitudes for indistinguishable final states. The size of this interference is governed by the relevant amplitude ratios and can include contributions from ${D}^{0}\mathrm{\text{\ensuremath{-}}}{\overline{D}}^{0}$ mixing. We present a method for simultaneously measuring the magnitudes and phases of these amplitude ratios and searching for ${D}^{0}\mathrm{\text{\ensuremath{-}}}{\overline{D}}^{0}$ mixing. We make use of fully- and partially-reconstructed ${D}^{0}{\overline{D}}^{0}$ pairs in both $C$ eigenstates, and we estimate experimental sensitivities based on a plausible charm factory data set. Similar analyses can be applied to coherent ${K}^{0}{\overline{K}}^{0}$, ${B}^{0}{\overline{B}}^{0}$, or ${B}_{s}^{0}{\overline{B}}_{s}^{0}$ pairs.
64 citations
Cornell University1, University of Florida2, George Mason University3, University of Illinois at Urbana–Champaign4, Carleton University5, University of Kansas6, Luther College7, University of Minnesota8, Northwestern University9, University at Albany, SUNY10, University of Oklahoma11, University of Pittsburgh12, University of Puerto Rico at Mayagüez13, Purdue University14, Rensselaer Polytechnic Institute15, University of Rochester16, Southern Methodist University17, Syracuse University18, Vanderbilt University19, Wayne State University20, Carnegie Mellon University21, University of Chicago22
TL;DR: In this paper, the authors observe signals for the decays {psi}(3770) yielding XJ/psi from data acquired with the CLEO detector operating at the CESR e{sup +}e{sup -} collider with {radical}(s)=3773 MeV.
Abstract: We observe signals for the decays {psi}(3770){yields}XJ/{psi} from data acquired with the CLEO detector operating at the CESR e{sup +}e{sup -} collider with {radical}(s)=3773 MeV. We measure the following branching fractions B({psi}(3770){yields}XJ/{psi}) and significances: (189{+-}20{+-}20)x10{sup -5} (11.6{sigma}) for X={pi}{sup +}{pi}{sup -} (80{+-}25{+-}16)x10{sup -5} (3.4{sigma}) for X={pi}{sup 0}{pi}{sup 0}, and (87{+-}33{+-}22)x10{sup -5} (3.5{sigma}) for X={eta}, where the errors are statistical and systematic, respectively. The radiative return process e{sup +}e{sup -}{yields}{gamma}{psi}(2S) populates the same event sample and is used to measure {gamma}{sub ee}[{psi}(2S)]=(2.54{+-}0.03{+-}0.11) keV.
47 citations
University of Kansas1, Luther College2, University of Minnesota3, Northwestern University4, University at Albany, SUNY5, Ohio State University6, University of Oklahoma7, University of Pittsburgh8, University of Puerto Rico9, Purdue University10, Rensselaer Polytechnic Institute11, University of Rochester12, Southern Methodist University13, Syracuse University14, Vanderbilt University15, Wayne State University16, Carnegie Mellon University17, University of Chicago18, Cornell University19, University of Florida20, George Mason University21, University of Illinois at Urbana–Champaign22, Indiana University23, Carleton University24
TL;DR: The cross section for e+e- -->psi(3770) -->hadrons at Ec.m.=3773 MeV is measured using the CLEO detector at the CESR e+ e- collider and the observed total cross section is extracted.
Abstract: We measure the cross section for e{sup +}e{sup -}{yields}{psi}(3770){yields}hadrons at E{sub c.m.}=3773 MeV to be (6.38{+-}0.08{sub -0.30}{sup +0.41}) nb using the CLEO detector at the CESR e{sup +}e{sup -} collider. The difference between this and the e{sup +}e{sup -}{yields}{psi}(3770){yields}DD cross section at the same energy is found to be (-0.01{+-}0.08{sub -0.30}{sup +0.41}) nb. With the observed total cross section, we extract {gamma}{sub ee}({psi}(3770))=(0.204{+-}0.003{sub -0.027}{sup +0.041}) keV. Uncertainties shown are statistical and systematic, respectively.
39 citations
Rensselaer Polytechnic Institute1, University of Rochester2, Southern Methodist University3, Syracuse University4, Vanderbilt University5, Wayne State University6, Carnegie Mellon University7, University of Chicago8, Cornell University9, University of Florida10, George Mason University11, University of Illinois at Urbana–Champaign12, Carleton University13, University of Kansas14, Luther College15, University of Minnesota16, Northwestern University17, University at Albany, SUNY18, University of Oklahoma19, University of Pittsburgh20, University of Puerto Rico at Mayagüez21, Purdue University22
TL;DR: In this paper, a search for the decay to two-body non-D\overline{D}$ final states in the CESR collider data was described, and a suggestive suppression was seen for the expected rate.
Abstract: We describe a search for $\ensuremath{\psi}(3770)$ decay to two-body non-$D\overline{D}$ final states in ${e}^{+}{e}^{\ensuremath{-}}$ data produced by the CESR collider and analyzed with the CLEO-c detector. Vector-pseudoscalar production ${\ensuremath{\rho}}^{0}{\ensuremath{\pi}}^{0}$, ${\ensuremath{\rho}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, $\ensuremath{\omega}{\ensuremath{\pi}}^{0}$, $\ensuremath{\phi}{\ensuremath{\pi}}^{0}$, $\ensuremath{\rho}\ensuremath{\eta}$, $\ensuremath{\omega}\ensuremath{\eta}$, $\ensuremath{\phi}\ensuremath{\eta}$, $\ensuremath{\rho}{\ensuremath{\eta}}^{\ensuremath{'}}$, $\ensuremath{\omega}{\ensuremath{\eta}}^{\ensuremath{'}}$, $\ensuremath{\phi}{\ensuremath{\eta}}^{\ensuremath{'}}$, ${K}^{*0}\overline{{K}^{0}}$, and ${K}^{*+}{K}^{\ensuremath{-}}$ is studied along with that of ${b}_{1}\ensuremath{\pi}$ (${b}_{1}^{0}{\ensuremath{\pi}}^{0}$ and ${b}_{1}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$) and ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$. The largest amount of disagreement between the expected rate for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\gamma}}^{*}\ensuremath{\rightarrow}X$ and that for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}X$ at $\sqrt{s}=3.773\text{ }\mathrm{GeV}$ is found for $X=\ensuremath{\phi}\ensuremath{\eta}$, at an excess cross section of $(2.4\ifmmode\pm\else\textpm\fi{}0.6)\text{ }\mathrm{pb}$ [${\ensuremath{\Gamma}}_{\ensuremath{\phi}\ensuremath{\eta}}^{\ensuremath{\psi}(3770)}=(7.4\ifmmode\pm\else\textpm\fi{}1.6)\text{ }\mathrm{keV}$], and a suggestive suppression is seen for ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ and $\ensuremath{\rho}\ensuremath{\pi}$. We conclude with form factor determinations for $\ensuremath{\omega}{\ensuremath{\pi}}^{0}$, $\ensuremath{\rho}\ensuremath{\eta}$, and $\ensuremath{\rho}{\ensuremath{\eta}}^{\ensuremath{'}}$.
38 citations
Cornell University1, University of Florida2, George Mason University3, University of Illinois at Urbana–Champaign4, Indiana University5, University of Kansas6, Luther College7, University of Minnesota8, Northwestern University9, University at Albany, SUNY10, University of Oklahoma11, University of Pittsburgh12, University of Puerto Rico13, Purdue University14, Rensselaer Polytechnic Institute15, University of Rochester16, Southern Methodist University17, Syracuse University18, Vanderbilt University19, Wayne State University20, Carleton University21, Carnegie Mellon University22, University of Bonn23, University of Chicago24
TL;DR: In this paper, the authors present measurements of the inclusive branching fractions for the decays D{sup + {yields}Xe{sup+} + {nu}{sub e}, using 281 pb{sup -1} of data collected on the {psi}(3770) resonance with the CLEO-c detector.
Abstract: We present measurements of the inclusive branching fractions for the decays D{sup +}{yields}Xe{sup +}{nu}{sub e} and D{sup 0}{yields}Xe{sup +}{nu}{sub e}, using 281 pb{sup -1} of data collected on the {psi}(3770) resonance with the CLEO-c detector. We find B(D{sup 0}{yields}Xe{sup +}{nu}{sub e})=(6.46{+-}0.17{+-}0.13)% and B(D{sup +}{yields}Xe{sup +}{nu}{sub e})=(16.13{+-}0.20{+-}0.33)%. Using the known D meson lifetimes, we obtain the ratio {gamma}{sub D{sup +}}{sup sl}/{gamma}{sub D{sup 0}}{sup sl}=0.985{+-}0.028{+-}0.015, confirming isospin invariance at the level of 3%. The positron momentum spectra from D{sup +} and D{sup 0} have consistent shapes.
28 citations
Southern Methodist University1, Syracuse University2, Vanderbilt University3, Wayne State University4, Carnegie Mellon University5, University of Chicago6, Cornell University7, University of Florida8, George Mason University9, University of Illinois at Urbana–Champaign10, Carleton University11, University of Kansas12, Luther College13, University of Minnesota14, Northwestern University15, University at Albany, SUNY16, University of Oklahoma17, University of Pittsburgh18, University of Puerto Rico at Mayagüez19, Purdue University20, Rensselaer Polytechnic Institute21, University of Rochester22
TL;DR: In this article, the authors observed the non-D\overline{D}$ decay of collision data acquired with the CLEO detector at the Cornell Electron Storage Ring with a statistical significance of 6.6 standard deviations.
Abstract: From ${e}^{+}{e}^{\ensuremath{-}}$ collision data acquired with the CLEO detector at the Cornell Electron Storage Ring, we observe the non-$D\overline{D}$ decay $\ensuremath{\psi}(3770)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c1}$ with a statistical significance of 6.6 standard deviations, using the two-photon cascades to $J/\ensuremath{\psi}$ and $J/\ensuremath{\psi}\ensuremath{\rightarrow}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$. We determine $\ensuremath{\sigma}\mathbf{(}{e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\psi}(3770)\mathbf{)}\ifmmode\times\else\texttimes\fi{}\mathcal{B}\mathbf{(}\ensuremath{\psi}(3770)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c1}\mathbf{)}=(18.0\ifmmode\pm\else\textpm\fi{}3.3\ifmmode\pm\else\textpm\fi{}2.5)\text{ }\text{ }\mathrm{pb}$ and branching fraction $\mathcal{B}\mathbf{(}\ensuremath{\psi}(3770)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c1}\mathbf{)}=(2.8\ifmmode\pm\else\textpm\fi{}0.5\ifmmode\pm\else\textpm\fi{}0.4)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$. We set 90% C.L. upper limits for the transition to ${\ensuremath{\chi}}_{c2}$ $({\ensuremath{\chi}}_{c0})$: $\ensuremath{\sigma}\ifmmode\times\else\texttimes\fi{}\mathcal{B}l5.7\text{ }\text{ }\mathrm{pb}$ ($l282\text{ }\text{ }\mathrm{pb}$) and $\mathcal{B}l0.9\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ ($l44\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$). We also determine $\ensuremath{\Gamma}\mathbf{(}\ensuremath{\psi}(3770)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c1}\mathbf{)}/\ensuremath{\Gamma}\mathbf{(}\ensuremath{\psi}(3770)\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}J/\ensuremath{\psi}\mathbf{)}=1.5\ifmmode\pm\else\textpm\fi{}0.3\ifmmode\pm\else\textpm\fi{}0.3$ ($g1.0$ at 90% C.L.), which bears upon the interpretation of $X(3872)$.
21 citations
University of Chicago1, Cornell University2, University of Florida3, George Mason University4, University of Illinois at Urbana–Champaign5, Indiana University6, Carleton University7, University of Kansas8, Luther College9, University of Minnesota10, Northwestern University11, University at Albany, SUNY12, Ohio State University13, University of Oklahoma14, University of Pittsburgh15, University of Puerto Rico at Mayagüez16, Purdue University17, Rensselaer Polytechnic Institute18, University of Rochester19, Southern Methodist University20, Syracuse University21, Vanderbilt University22, Wayne State University23, California Institute of Technology24, Carnegie Mellon University25
TL;DR: In this article, the authors present experimental limits on high-q^2 contributions to charmless semileptonic B decays of the form expected from the weak annihilation (WA) decay mechanism.
Abstract: We present the first experimental limits on high-q^2 contributions to charmless semileptonic B decays of the form expected from the weak annihilation (WA) decay mechanism. Such contributions could bias determinations of |V_(ub)| from inclusive measurements of B→X_ulν. Using a wide range of models based on available theoretical input we set a limit of Γ_(WA)/Γ_(b→u) <7.4% (90% confidence level) on the WA fraction, and assess the impact on previous inclusive determinations of |V_(ub)|.
18 citations
Wayne State University1, California Institute of Technology2, Carleton University3, Carnegie Mellon University4, University of Chicago5, Cornell University6, University of Florida7, George Mason University8, University of Illinois at Urbana–Champaign9, University of Kansas10, Luther College11, University of Minnesota12, Northwestern University13, University at Albany, SUNY14, Ohio State University15, University of Oklahoma16, University of Pittsburgh17, University of Puerto Rico at Mayagüez18, Purdue University19, Rensselaer Polytechnic Institute20, University of Rochester21, Southern Methodist University22, Syracuse University23, Vanderbilt University24
TL;DR: In this paper, the CLEO detector at the Cornell Electron Storage Ring has been used to observe the B{sub s} meson in e{sup +}e{sup -} annihilation at the upilon (5S) resonance.
Abstract: Using the CLEO detector at the Cornell Electron Storage Ring, we have observed the B{sub s} meson in e{sup +}e{sup -} annihilation at the {upsilon}(5S) resonance. We find 14 candidates consistent with B{sub s} decays into final states with a J/{psi} or a D{sub s}{sup (*)-}. The probability that we have observed a background fluctuation is less than 8x10{sup -10}. We have established that at the energy of the {upsilon}(5S) resonance B{sub s} production proceeds predominantly through the creation of B{sub s}*B{sub s}* pairs. We find {sigma}(e{sup +}e{sup -}{yields}B{sub s}*B{sub s}*)=[0.11{sub -0.03}{sup +0.04}(stat){+-}0.02(syst)] nb, and set the following limits: {sigma}(e{sup +}e{sup -}{yields}B{sub s}B{sub s})/{sigma}(e{sup +}e{sup -}{yields}B{sub s}*B{sub s}*)<0.16 and [{sigma}(e{sup +}e{sup -}{yields}B{sub s}B{sub s}*)+{sigma}(e{sup +}e{sup -}{yields}B{sub s}*B{sub s})]/{sigma}(e{sup +}e{sup -}{yields}B{sub s}*= B{sub s}*)<0.16 (90% C.L.). The mass of the B{sub s}* meson is measured to be M{sub B{sub s}}{sub *}=[5.414{+-}0.001(stat){+-}0.003(syst)] GeV/c{sup 2}.
14 citations
Northwestern University1, University at Albany, SUNY2, Ohio State University3, University of Oklahoma4, University of Pittsburgh5, University of Puerto Rico at Mayagüez6, Purdue University7, Rensselaer Polytechnic Institute8, University of Rochester9, Southern Methodist University10, Syracuse University11, Vanderbilt University12, Wayne State University13, California Institute of Technology14, Carnegie Mellon University15, University of Chicago16, Cornell University17, University of Florida18, George Mason University19, University of Illinois at Urbana–Champaign20, Carleton University21, University of Kansas22, Luther College23, University of Minnesota24
TL;DR: In this paper, the two-photon width of X_(c2)^3P_2 state of charmonium has been measured using 14.4 fb^(-1) of e^+e^-data taken at √s=======9.46-11.30 GeV with the CLEO III detector.
Abstract: The two-photon width of X_(c2)^3P_2 state of charmonium has been measured using 14.4 fb^(-1) of e^+e^-data taken at √s
=9.46–11.30 GeV with the CLEO III detector. The yy-fusion reaction studied is e^+e^- → e^+e^-yy, → yy X_(c2) → yJ/Ψ → ye^+e^-(µ^+µ^-). We measure Г_(yy) (X_(c2))B(X_(c2)) → y
J/Ψ)B(J/Ψ → e^+e^- + µ^+µ^-)= 13.2 ± 1.4(stat)± 1.1(syst) eV, and obtain Г yy(Xc2)= 559 ± 57(stat) ± 48(syst) ± 36(br) eV. This result is in excellent agreement with the result of -fusion measurement by Belle and is consistent with that of the pp → X_(c2) → yy measurement, when they are both reevaluated using the recent CLEO result for the radiative decay X_(c2) → J/Ψ .
9 citations
University of Illinois at Urbana–Champaign1, Carleton University2, University of Kansas3, Luther College4, University of Minnesota5, Northwestern University6, University at Albany, SUNY7, Ohio State University8, University of Oklahoma9, University of Pittsburgh10, University of Puerto Rico11, Purdue University12, Rensselaer Polytechnic Institute13, University of Rochester14, Southern Methodist University15, Syracuse University16, Vanderbilt University17, Wayne State University18, California Institute of Technology19, Carnegie Mellon University20, University of Chicago21, Cornell University22, Columbia University23, University of Maryland, College Park24, University of Florida25, George Mason University26
TL;DR: In this article, the authors search for the di-pion transition chi_b(2P) -> pi pi pi chi-b(1P) in the CLEO III sample of Upsilon(3S) decays in the exclusive decay chain.
Abstract: We have searched for the di-pion transition chi_b(2P) -> pi pi chi_b(1P) in the CLEO III sample of Upsilon(3S) decays in the exclusive decay chain: Upsilon(3S) -> gamma chi_b(2P), chi_b(2P) -> pi pi chi_b(1P), chi_b(1P) -> gamma Upsilon(1S), Upsilon(1S) -> lepton pairs. Our studies include both pi+ pi- and pi0 pi0, each analyzed both in fully reconstructed events and in events with one pion undetected. We show that the null hypothesis is not substantiated. Under reasonable assumptions, we find the partial decay width to be Gamma[chi_b(2P) -> pi pi chi_b(1P)] = (0.83 +/- 0.22 +/- 0.08 +/- 0.19) keV, with the uncertainties being statistical, internal CLEO systematics, and common systematics from outside sources.
George Mason University1, University of Illinois at Urbana–Champaign2, Indiana University3, University of Kansas4, Luther College5, University of Minnesota6, Northwestern University7, University at Albany, SUNY8, University of Oklahoma9, University of Pittsburgh10, University of Puerto Rico11, Purdue University12, Rensselaer Polytechnic Institute13, University of Rochester14, Southern Methodist University15, Syracuse University16, Vanderbilt University17, Wayne State University18, Carleton University19, Carnegie Mellon University20, University of Chicago21, Cornell University22, University of Florida23
TL;DR: In this article, the relative decay rates in purely leptonic D{sup +} meson decays were investigated and an upper limit on the ratio of R to the standard model expectation of 265 was established at 90% confidence level.
Abstract: We test whether or not the {tau} lepton manifests the same couplings as the {mu} lepton by investigating the relative decay rates in purely leptonic D{sup +} meson decays We use 281 pb{sup -1} of data accumulated at the {psi}(3770) resonance with the CLEO-c detector, to limit B(D{sup +}{yields}{tau}{sup +}{nu})<21x10{sup -3} at 90% confidence level (CL), thus allowing us to place the first upper limit on the ratio R={gamma}(D{sup +}{yields}{tau}{sup +}{nu})/{gamma}(D{sup +}{yields}{mu}{sup +}{nu}) The ratio of R to the standard model expectation of 265 then is <18 at 90% CL, consistent with the prediction of lepton universality
Posted Content•
Sapienza University of Rome1, CERN2, University of Warwick3, Brookhaven National Laboratory4, California Institute of Technology5, Carleton University6, Iowa State University7, University of California, Irvine8, Massachusetts Institute of Technology9, National Taiwan University10, Folkwang University of the Arts11, Nara Women's University12, University of Pisa13, University of Wisconsin-Madison14, University of Paris-Sud15, École Polytechnique16, University of Oxford17, Carnegie Mellon University18
TL;DR: In this paper, the main goal is the measurement of the angles γ and β from B decays involving D or charmonium mesons, as well as new approaches and high statistics projections.
Abstract: The main goal is the measurement of the angles γ and β from B decays involving D or charmonium mesons. The limitations and ways to overcome them will be discussed, as well as new approaches and high statistics projections.