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Study of the semileptonic decay D 0 â (K)over-bar 0 Ï - e + Îœe
We report an improved study of the semileptonic decay D-0 -> (K) over bar (0)pi(-)e(+)nu(e) based on a sample of 7.9 fb(-1) of e(+) e(-) annihilation data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII collider. The branching fraction of this decay is measured to be B(D-0 -> (K) over bar (0)pi(-)e(+)nu(e)) = (1.444 +/- 0.022(stat) +/- 0.024(syst))%, which is the most precise to date, where the first uncertainty is statistical and the second is systematic. Based on investigation of the decay dynamics, we find that the decay is dominated by the K*(892)(-) component and present an improved measurement of its branching fraction to be B(D-0 -> K*(892)(-)e(+)nu(e)) = (2.039 +/- 0.032(stat) +/- 0.034(syst))%. We also determine the ratios of the hadronic form factors for the K*(892)- e(+) nu(e) decay to be rV = V (0)/A(1)(0) = 1.48 +/- 0.05(stat) +/- 0.02(syst) and r(2) = A(2)(0)/A1(0) = 0.70 +/- 0.04(stat) +/- 0.02(syst), where V (0) is the vector form factor and A(1,2)(0) are the axial form factors. In addition, the (K) over bar (0)pi(-) S-wave component is found to account for (5.87 +/- 0.32(stat) +/- 0.16(syst))% of the total decay rate, corresponding to a branching fraction of B[D-0 ->((K) over bar (0)pi(-)) S-wave e(+)nu(e)] = (0.085 +/- 0.005(stat) +/- 0.003(syst))%.
Journal Article
Like a charm : a novel in voices
A collection of sixteen interconnected stories that take place from 1800 to the present centers around an unlucky charm bracelet that is surreptitiously obtained and then discarded or lost by a series of protagonists.
Book
Search for lepton number violating decays of D s + → h - h 0 e + e
Based on 7.33 fb(-1) of e(+)e(-) collision data collected by the BESIII detector operating at the BEPCII collider at center-of-mass energies from 4.128 to 4.226 GeV, a search for the Majorana neutrino nu(m) is conducted in the lepton-number-violating decays of D-s(+) -> h(-)h(0)e(+)e(+). Here, h(-) represents a K- or pi(-), and h(0) represents a pi(0), K-S(0) or phi. No significant signal is observed, and the upper limits of their branching fractions at the 90% confidence level are determined to be B(D-s(+) -> phi pi(-)e(+)e(+)) < 6.9 x 10(-5), B(D-s(+) -> phi K(-)e(+)e(+)) < 9.9 x 10(-5), B(D-s(+)-> K-S(0)pi(-)e(+)e(+)) < 1.3 x 10(-5), B(D-s(+) -> K(S)(0)K(-)e(+)e(+)) < 2.9 x 10(-5), B(D-s(+) -> pi(-)pi(0)e(+)e(+)) < 2.9 x 10(-5) and B(D-s(+) -> K-pi(0)e(+)e(+)) < 3.4 x 10(-5). The Majorana neutrino is searched for with different mass assumptions within the range [0.20, 0.80] GeV/c(2) in the decay of D-s(+) -> phi e(+)nu(m) with nu(m) -> pi(-)e(+), and the upper limits of the branching fractions at the 90% confidence level are at the level of 10(-5)-10(-2), depending on the mass of the Majorana neutrino.
Journal Article
Mystery of the ivory charm
Nancy Drew determines whether an ivory elephant charm really protects its wearer from harm when she investigates the involvement of a member of the Bengleton Wild-Animal Show in a mysterious scheme.
Book
The Power of Words
n medieval and early modern Europe, the use of charms was a living practice in all strata of society. The essays in this latest CEU Press publication explore the rich textual tradition of archives, monasteries, and literary sources. The author also discusses texts amassed in folklore archives and ones that are still accessible through field work in many rural areas of Europe.
eBook
Crystal cove
When Justine Hoffman was born her mother cast a spell to protect her from heartbreak, and as a result, she is incapable of falling in love. Eventually Justine's irrepressible curiosity--and her wish to lead a normal life--get the better of her, and she finds a way to temporarily block the enchantment. However, when Justine meets the mysterious Jason Black, she accidentally unleashes a storm of desire and danger that will threaten everything she holds dear ... and together Justine and Jason discover that love is the most powerful magic of all.
Book
Measurements of K S 0 - K L 0 asymmetries in the decays Λ c + → pK L,S 0 , pK L,S 0 π + π - and pK L,S 0 π 0
Using e(+)e(-) annihilation data sets corresponding to an integrated luminosity of 4.5 fb(-1), collected with the BESIII detector at center-of-mass energies between 4.600 and 4.699 GeV, we report the first measurements of the absolute branching fractions B(Lambda(+)(c)-> pK(L)(0) = (1.67 +/- 0.06 +/- 0.04)%, B(Lambda(+)(c)-> pK(L)(0) pi(+)pi(-) = (1.69 +/- 0.10 +/- 0.05)%, and B(Lambda(+)(c)-> pK(L)(0)pi(0) = (2.02 +/- 0.13 +/- 0.05)%, where the first uncertainties are statistical and the second systematic. Combining with the known branching fractions of Lambda(+)(c)-> pK(S)(0), Lambda(+)(c)-> pK(S)(0) pi(+)pi(-), and Lambda(+)(c)-> pK(S)(0)pi(0), we present the first measurements of the K-S(0)-K-L(0) asymmetries R(Lambda K-+(c)S,L(0) X) = B(Lambda(+)(c) -> (KSX)-X-0-B (Lambda(+)(c)-> K-L(0) X/B(Lambda(+)(c)->(KSX)-X-0)+B(Lambda(+)(c)->(KLX)-X-0) in charmed baryon decays: R(Lambda(+)(c)pK(S,L)(0)) = -0.025 +/- 0.031, R(Lambda(+)(c)pK(S,L)(0) pi(+)pi(-)) = -0.027 +/- 0.048 and R(Lambda(+)(c)pK(S,L)(0)pi(0) = -0.015 +/- 0.046. No significant asymmetries with statistical significance are observed.
Journal Article
Harry Potter Patronus Charm : magical film projections
\"Discover the powerful Patronus Charm that Harry Potter and other wizards and witches use to produce a magical guardian. In a dark room, shine a light through the window on each page of this unique book to project incredible scenes on the wall or ceiling. Read along and experience magical moments fro the Harry Potter films like never before\" -- Page [4] of cover.
Book
Search for the radiative decays D + â Î³Ï + and D + â γK
We search for the radiative decays D+ -> gamma rho(+) and D+ -> gamma K*+ using 20.3 fb(-1) of e(+)e(-) annihilation data collected at the center-of-mass energy root s = 3.773 GeV by the BESIII detector operating at the BEPCII collider. No significant signals are observed, and the upper limits on the branching fractions of D+-> gamma rho(+) and D+-> gamma K*+ at 90% confidence level are set to be 1.3 x 10(-5) and 1.8 x 10(-5), respectively.
Journal Article