Preprints

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2018-10-18
12:42
OpenAccess [PUBDB-2018-03832] Preprint/Report
; ; ; et al
Longitudinal double-spin asymmetries in semi-inclusive deep-inelastic scattering of electrons and positrons by protons and deuterons
[DESY-18-181; arXiv:1810.07054]
 GO
A comprehensive collection of results on longitudinal double-spin asymmetries is presented for charged pions and kaons produced in semi-inclusive deep-inelastic scattering of electrons and positrons on the proton and deuteron, based on the full HERMES data set. The dependence of the asymmetries on hadron transverse momentum and azimuthal angle extends the sensitivity to the flavor structure of the nucleon beyond the distribution functions accessible in the collinear framework. [...]
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2018-10-02
10:46
arXiv [PUBDB-2018-03704] Preprint/Report
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On operator mixing in fermionic CFTs in non-integer dimensions
[arXiv:1809.00021; DESY-18-149]
We consider renormalization of four-fermion operators in the critical QED and $SU(N_c)$ version of Gross--Neveu--Yukawa model in non-integer dimensions. Since the number of mixing operators is infinite, the diagonalization of an anomalous dimension matrix becomes a nontrivial problem. [...]
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2018-10-01
12:19
OpenAccess [PUBDB-2018-03685] Preprint/Report
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Integrability in heavy quark effective theory record
[arXiv:1804.06289; DESY-18-056]
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It was found that renormalization group equations in the heavy-quark effective theory (HQET) for the operators involving one effective heavy quark and light degrees of freedom are completely integrable in some cases and are related to spin chain models with the Hamiltonian commuting with the nondiagonal entry C(u) of the monodromy matrix. In this work we provide a more complete mathematical treatment of such spin chains in the QISM framework. [...]
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ddc:530
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2018-10-01
10:53
arXiv [PUBDB-2018-03678] Preprint/Report
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Breakdown of NRQCD Factorization in Processes Involving Two Quarkonia and its Cure
[arXiv:1809.07993; DESY-18-168]
We study inclusive processes involving two heavy quarkonia in nonrelativisitic QCD (NRQCD) and demonstrate that, in the presence of two P-wave Fock states, NRQCD factorization breaks down, leaving uncanceled infrared singularities. As phenomenologically important examples, we consider the decay $\Upsilon \to \chi_{cJ}+X$ via $b\bar{b}({}^3P_{J_b}^{[8]})\to c\bar{c}({}^3P_J^{[1]})+gg$ and the production process $e^+e^-\to J/\psi+\chi_{cJ}+X$ via $e^{+}e^{-}\to c\bar{c}({}^3P_{J_1}^{[8]})+c\bar{c}({}^3P_J^{[1]})+g$. [...]
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2018-09-27
10:28
OpenAccess [PUBDB-2018-03639] Preprint/Report
; ; ; et al
Search for a charged Higgs boson decaying to charm and bottom quarks in proton-proton collisions at $\sqrt{s} =$ 8 TeV
[arXiv:1808.06575; CMS-HIG-16-030; CERN-EP-2018-121]
 GO
A search for charged Higgs boson decaying to a charm and a bottom quark (H$^+\to$ c$\overline{\mathrm{b}}$) is performed using 19.7 fb$^{-1}$ of pp collision data at $\sqrt{s} =$ 8 TeV. The production mechanism investigated in this search is $\mathrm{t\overline{t}}$ pair production in which one top quark decays to a charged Higgs boson and a bottom quark and the other decays to a charged lepton, a neutrino, and a bottom quark. [...]
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2018-09-27
10:24
OpenAccess [PUBDB-2018-03637] Preprint/Report
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Measurement of jet substructure observables in $\mathrm{t\overline{t}}$ events from proton-proton collisions at $\sqrt{s}=$ 13TeV
[arXiv:1808.07340; CMS-TOP-17-013; CERN-EP-2018-214]
 GO
A measurement of jet substructure observables is presented using \ttbar events in the lepton+jets channel from proton-proton collisions at $\sqrt{s}=$ 13 TeV recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 35.9 fb$^{-1}$. Multiple jet substructure observables are measured for jets identified as bottom, light-quark, and gluon jets, as well as for inclusive jets (no flavor information). [...]
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2018-09-27
10:10
OpenAccess [PUBDB-2018-03634] Preprint/Report
; ; ; et al
Charged-particle nuclear modification factors in XeXe collisions at $\sqrt{s_\mathrm{NN}}=$ 5.44 TeV
[arXiv:1809.00201; CMS-HIN-18-004; CERN-EP-2018-228]
 GO
The differential yields of charged particles having pseudorapidity within $|η|<1$ are measured using xenon-xenon (XeXe) collisions at $\sqrt{{s}_{NN}} =$ 5.44 TeV. The data, corresponding to an integrated luminosity of 3.42 $μb^{−1}$, were collected in 2017 by the CMS experiment at the LHC [...]
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2018-09-27
10:05
OpenAccess [PUBDB-2018-03632] Preprint/Report
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Search for physics beyond the standard model in high-mass diphoton events from proton-proton collisions at $\sqrt{s} =$ 13 TeV
[arXiv:1809.00327; CMS-EXO-17-017; CERN-EP-2018-219]
 GO
A search for physics beyond the standard model is performed using a sample of high-mass diphoton events produced in proton-proton collisions at $\sqrt{s} = $ 13 TeV. The data sample was collected in 2016 with the CMS detector at the LHC and corresponds to an integrated luminosity of 35.9 fb$^{-1}$. [...]
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2018-09-27
10:00
OpenAccess [PUBDB-2018-03630] Preprint/Report
; ; ; et al
Studies of $B^*_\mathrm{s2}(5840)^0$ and $B_\mathrm{s1}(5830)^0$ mesons including the observation of the $B^*_\mathrm{s2}(5840)^0\to B^0 K_\mathrm{S}^0$ decay in proton-proton collisions at $\sqrt{s}=$8 TeV
[arXiv:1809.03578; CMS-BPH-16-003; CERN-EP-2018-224]
 GO
Measurements of $\mathrm{B}^*_\mathrm{s2}(5840)^0$ and $\mathrm{B}_\mathrm{s1}(5830)^0$ mesons are performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of 19.6 fb$^{-1}$, collected with the CMS detector at the LHC at a centre-of-mass energy of 8 TeV. The analysis studies $P$-wave $\mathrm{B}^0_\mathrm{S}$ meson decays into $\mathrm{B}^{(*)+}\mathrm{K}^-$ and $\mathrm{B}^{(*)0}\mathrm{K}^0_\mathrm{S}$, where the $\mathrm{B}^+$ and $\mathrm{B}^0$ mesons are identified using the decays $\mathrm{B}^+\to\mathrm{J}/\psi\,\mathrm{K}^+$ and $\mathrm{B}^0\to\mathrm{J}/\psi\,\mathrm{K}^*(892)^0$. [...]
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2018-09-27
09:57
OpenAccess [PUBDB-2018-03629] Preprint/Report
; ; ; et al
Search for the associated production of the Higgs boson and a vector boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV via Higgs boson decays to $\tau$ leptons
[arXiv:1809.03590; CMS-HIG-18-007; CERN-EP-2018-221]
 GO
A search for the standard model Higgs boson, decaying to a pair of $\tau$ leptons and produced in association with a W or a Z boson is performed. A data sample of proton-proton collisions collected at $\sqrt{s} =$ 13 TeV by the CMS experiment at the CERN LHC is used, corresponding to an integrated luminosity of 35.9 fb$^{-1}$. [...]
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