J. Alexander

activity

19942020

most citedBranching Fraction and Photon Energy Spectrum b -> s gamma

428 citations · 6.9k across the 139 of their papers we have counts for

collaborators

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99 papers · 1 filter

hep-ex2020★ 8 cited

Production of $π^{0}$ and $η$ mesons in U $+$ U collisions at $s_{_{N N}} = 192$ GeV

U. Acharya, C. Aidala, N. N. Ajitanand +399

The PHENIX experiment at the Relativistic Heavy Ion Collider measured $π^{0}$ and $η$ mesons at midrapidity in U $+$ U collisions at $s_{_{N N}} = 192$ GeV in a wide transverse mom…

hep-ex2018★ 20 cited

Low-momentum direct photon measurement in Cu $+$ Cu collisions at $s_{_{N N}} = 200$ GeV

A. Adare, S. Afanasiev, C. Aidala +447

We have measured direct photons for $p_{T} < 5$ GeV/ $c$ in minimum bias and 0\%--40\% most central events at midrapidity for Cu $+$ Cu collisions at $s_{_{N N}} = 200$ GeV. The $e^{+…

hep-ex2018★ 21 cited

Cross section and longitudinal single-spin asymmetry $A_{L}$ for forward $W^{\pm} \to μ^{\pm} ν$ production in polarized $p$ $+$ $p$ collisions at $s = 510$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +426

We have measured the cross section and single spin asymmetries from forward $W^{\pm} \to μ^{\pm} ν$ production in longitudinally polarized $p$ $+$ $p$ collisions at $\sqrt{s}=51…

hep-ex2017★ 9 cited

Measurement of emission angle anisotropy via long-range angular correlations with high $p_{T}$ hadrons in $d$ $+$ Au and $p$ $+$ $p$ collisions at $s_{_{N N}} = 200$ GeV

A. Adare, C. Aidala, N. N. Ajitanand +470

We present measurements of two-particle angular correlations between high-transverse-momentum ( $2 < p_{T} < 11$ GeV/ $c$ ) $π^{0}$ observed at midrapidity ( $∣ η ∣ < 0.35$ ) and particles produced…

hep-ex2017★ 11 cited

Measurements of $B \to J / ψ$ at forward rapidity in $p$ $+$ $p$ collisions at $s = 510$ GeV

C. Aidala, N. N. Ajitanand, Y. Akiba +427

We report the first measurement of the fraction of $J / ψ$ mesons coming from $B$ -meson decay ( $F_{B \to J / ψ}$ ) in $p$ + $p$ collisions at $s =$ 510 GeV. The measurement…

hep-ex2015★ 40 cited

Measurement of parity-violating spin asymmetries in W $^{\pm}$ production at midrapidity in longitudinally polarized $p$ $+$ $p$ collisions

A. Adare, C. Aidala, N. N. Ajitanand +447

We present measurements from the PHENIX experiment of large parity-violating single spin asymmetries of high transverse momentum electrons and positrons from $W^{\pm} / Z$ decays, prod…

hep-ex2014

Inclusive cross sections, charge ratio and double-helicity asymmetries for $π^{+}$ and $π^{-}$ production in $p$ $+$ $p$ collisions at $s$ =200 GeV

A. Adare, C. Aidala, N. N. Ajitanand +378

We present the midrapidity charged pion invariant cross sections and the ratio of $π^{-}$ -to- $π^{+}$ production ( $5 < p_{T} < 13$ GeV/ $c$ ), together with the double-helicity asymmetries ($5<…

hep-ex2014★ 12 cited

Planning the Future of U.S. Particle Physics (Snowmass 2013): Chapter 8: Instrumentation Frontier

M. Demarteau, R. Lipton, H. Nicholson +211

These reports present the results of the 2013 Community Summer Study of the APS Division of Particles and Fields ("Snowmass 2013") on the future program of particle physics in the…

hep-ex2013★ 13 cited

Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at $s =$ 200 and 62.4 GeV

A. Adare, S. Afanasiev, C. Aidala +448

Measurements of transverse-single-spin asymmetries ( $A_{N}$ ) in $p$ $+$ $p$ collisions at $s =$ 62.4 and 200 GeV with the PHENIX detector at RHIC are presented. At midrapidity,…

hep-ex2013★ 15 cited

Updated measurements of absolute $D^{+}$ and $D^{0}$ hadronic branching fractions and $σ (e^{+} e^{-} \to D D)$ at $E_{cm} = 3774$ MeV

CLEO Collaboration, G. Bonvicini, D. Cinabro M. J. Smith +66

Utilizing the full CLEO-c data sample of 818 pb $^{- 1}$ of $e^{+} e^{-}$ data taken at the $ψ (3770)$ resonance, we update our measurements of absolute hadronic branching fractions of cha…

hep-ex2013★ 44 cited

Improved Measurement of Absolute Hadronic Branching Fractions of the Ds+ Meson

CLEO Collaboration, P. U. E. Onyisi, G. Bonvicini +67

The branching fractions of Ds meson decays serve to normalize many measurements of processes involving charm quarks. Using 586 pb^-1 of e+ e- collisions recorded at a center of mas…

hep-ex2012★ 10 cited

Double Spin Asymmetry of Electrons from Heavy Flavor Decays in p+p Collisions at sqrt(s)=200 GeV

A. Adare, S. Afanasiev, C. Aidala +381

We report on the first measurement of double-spin asymmetry, A_LL, of electrons from the decays of hadrons containing heavy flavor in longitudinally polarized p+p collisions at sqr…

hep-ex2012★ 25 cited

Studies of the decays D^0 \rightarrow K_S^0K^-π^+ and D^0 \rightarrow K_S^0K^+π^-

CLEO Collaboration, J. Insler, H. Muramatsu +73

The first measurements of the coherence factor R_{K_S^0Kπ} and the average strong--phase difference δ^{K_S^0Kπ} in D^0 \to K_S^0 K^\mpπ^\pm decays are reported. These parameters ca…

hep-ex2012★ 32 cited

Amplitude analysis of D0->K+K-pi+pi-

M. Artuso, S. Blusk, R. Mountain +73

The first flavor-tagged amplitude analysis of the decay D0 to the self-conjugate final state K+K-pi+pi- is presented. Data from the CLEO II.V, CLEO III, and CLEO-c detectors are us…

hep-ex2011★ 40 cited

First Measurement of the Form Factors in the Decays D0 to rho- e+ nu_e and D+ to rho0 e+ nu_e

CLEO Collaboration, S. Dobbs, Z. Metreveli +78

Using the entire CLEO-c psi(3770) to DDbar event sample, corresponding to an integrated luminosity of 818 pb^-1 and approximately 5.4 x 10^6 DDbar events, we measure the form facto…

hep-ex2011★ 36 cited

Amplitude analyses of the decays chi_c1 -> eta pi+ pi- and chi_c1 -> eta' pi+ pi-

CLEO Collaboration, G. S. Adams, J. Napolitano +74

Using a data sample of 2.59 x 10^7 psi(2S) decays obtained with the CLEO-c detector, we perform amplitude analyses of the complementary decay chains chi_c1 -> eta pi+ pi- and chi_c…

hep-ex2011★ 10 cited

Branching fractions for Y(3S) -> pi^0 h_b and psi(2S) -> pi^0 h_c

CLEO Collaboration, J. Y. Ge, D. H. Miller +73

Using e^+e^- collision data corresponding to 5.88M Y(3S) [25.9M psi(2S)] decays and acquired by the CLEO III [CLEO-c] detectors operating at CESR, we study the single-pion transiti…

hep-ex2011★ 8 cited

Search for the decay $D_{s}^{+} \to ω e^{+} ν$

CLEO Collaboration, L. Martin, A. Powell +73

We present the first search for the decay $D_{s}^{+} \to ω e^{+} ν$ to test the four-quark content of the $D_{s}^{+}$ and the $ω$ - $ϕ$ mixing model for this decay. We use 586 $\mathrm{pb}^…

hep-ex2011★ 104 cited

Ground and excited charmonium state production in p+p collisions at sqrt(s)=200 GeV

A. Adare, S. Afanasiev, C. Aidala +444

We report on charmonium measurements [J/psi(1S), psi'(2S), and chi_c(1P)] in p+p collisions at sqrt(s)=200 GeV. We find that the fraction of J/psi coming from the feed-down decay o…

hep-ex2011★ 9 cited

Observation of the Dalitz Decay $D_{s}^{*+} \to D_{s}^{+} e^{+} e^{-}$

D. Cronin-Hennessy, J. Hietala, S. Dobbs +76

Using 586 $pb^{- 1}$ of $e^{+} e^{-}$ collision data acquired at $s = 4.170$ GeV with the CLEO-c detector at the Cornell Electron Storage Ring, we report the first obse…

hep-ex2011★ 50 cited

Observation of the h_c(1P) using e^+e^- collisions above DDbar threshold

CLEO Collaboration, T. K. Pedlar, D. Cronin-Hennessy +77

Using 586pb^-1 of e^+e^- collision data at E_CM = 4170MeV, produced at the CESR collider and collected with the CLEO-c detector, we observe the process e^+e^- --> pi^+ pi^- h_c(1P)…

hep-ex2010★ 7 cited

Upsilon(1S)->gamma+f2'(1525); f2'(1525)->K0sK0s decays

The CLEO Collaboration, D. Besson, D. P. Hogan +83

We report on a study of exclusive radiative decays of the Upsilon(1S) resonance into a final state consisting of a photon and two K0s candidates. We find evidence for a signal for…

hep-ex2010★ 32 cited

Studies of D^+ -> {eta', eta, phi} e^+ nu_e

CLEO Collaboration, J. Yelton, P. Rubin +85

We report the first observation of the decay D^+ -> eta' e^+ nu_e in two analyses, which combined provide a branching fraction of B(D+ -> eta' e nu) = (2.16 +/- 0.53 +/- 0.07) x 10…

hep-ex2010★ 59 cited

Cross section and double helicity asymmetry for eta mesons and their comparison to neutral pion production in p+p collisions at sqrt(s)=200 GeV

A. Adare, S. Afanasiev, C. Aidala +429

Measurements of double-helicity asymmetries for inclusive hadron production in polarized p+p collisions are sensitive to helicity--dependent parton distribution functions, in parti…

Production of π0 and η mesons in U+U collisions at sNN​​​=192 GeV

Low-momentum direct photon measurement in Cu+Cu collisions at sNN​​​=200 GeV

Cross section and longitudinal single-spin asymmetry AL​ for forward W±→μ±ν production in polarized p+p collisions at s​=510 GeV

Measurement of emission angle anisotropy via long-range angular correlations with high pT​ hadrons in d+Au and p+p collisions at sNN​​​=200 GeV

Measurements of B→J/ψ at forward rapidity in p+p collisions at s​=510 GeV

Measurement of parity-violating spin asymmetries in W± production at midrapidity in longitudinally polarized p+p collisions

Inclusive cross sections, charge ratio and double-helicity asymmetries for π+ and π− production in p+p collisions at s​=200 GeV