Thomas Mannel
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View article: D → Pℓ+ℓ− decays assisted by QCD light-cone sum rules
D → Pℓ+ℓ− decays assisted by QCD light-cone sum rules Open
A bstract We suggest a new method to analyse the rare D ( s ) → Pℓ + ℓ − decays ( P = π , K ), combining QCD light-cone sum rules (LCSR) with hadronic dispersion relations. As our main study case, we consider the D + → π + ℓ + ℓ − mode whi…
View article: QCD corrections for subleading powers in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:msub><mml:mrow><mml:mi>m</mml:mi></mml:mrow><mml:mrow><mml:mi>b</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> for the nonleptonic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>b</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>c</mml:mi><mml:mover accent="true"><mml:mi>c</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mi>s</mml:mi></mml:math> transition
QCD corrections for subleading powers in for the nonleptonic transition Open
We compute next-to-leading order QCD corrections to the 1/mb2 terms of the heavy quark expansion, for the contribution to inclusive nonleptonic bottom hadron decays, induced by the charged-current operators mediating the b→cc¯s transition.…
View article: $D\to P \ell^+\ell^-$ decays assisted by QCD light-cone sum rules
$D\to P \ell^+\ell^-$ decays assisted by QCD light-cone sum rules Open
We suggest a new method to analyse the rare $D_{(s)}\to P \ell^+\ell^-$ decays ($P=π,K$), combining QCD light-cone sum rules (LCSR) with hadronic dispersion relations. As our main study case, we consider the $D^+\toπ^+\ell^+\ell^-$ mode wh…
View article: Erratum to: Inclusive semileptonic $$ b\to c\ell \overline{\nu} $$ decays to order $$ 1/{m}_b^5 $$
Erratum to: Inclusive semileptonic $$ b\to c\ell \overline{\nu} $$ decays to order $$ 1/{m}_b^5 $$ Open
A correction to this paper has been published: https://doi.org/10.1007/JHEP02(2024)226
View article: QCD corrections at subleading power for inclusive nonleptonic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>b</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>c</mml:mi><mml:mover accent="true"><mml:mrow><mml:mi>u</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover><mml:mi>d</mml:mi></mml:mrow></mml:math> decays
QCD corrections at subleading power for inclusive nonleptonic decays Open
In this paper we compute the next-to-leading order (NLO) QCD corrections for the inclusive nonleptonic decay rates of B hadrons at subleading power of the heavy quark expansion. In particular, we discuss the coefficient of the chromomagnet…
View article: Quark-hadron duality violations and higher-order 1/mb corrections in inclusive semileptonic B decays
Quark-hadron duality violations and higher-order 1/mb corrections in inclusive semileptonic B decays Open
A bstract The theoretical description and data for inclusive semileptonic B decays have reached incredible precision. This motivated us to re-animate the discussion of possible Quark-Hadron Duality violations. There seems that there is cur…
View article: Pushing the Heavy Quark Expansion for $b\to cl\barν$ to Higher Order in $1/m_b$
Pushing the Heavy Quark Expansion for $b\to cl\barν$ to Higher Order in $1/m_b$ Open
The Heavy Quark Expansion (HQE) is the major tool to perform calculations for inclusive semileptonic $B\to X_cl\barν$ and, consequently, for precision determinations of the CKM matrix element $V_{cb}$. To further improve precision, we push…
View article: QCD corrections at subleading power for inclusive nonleptonic $b\rightarrow c\bar u d$ decays
QCD corrections at subleading power for inclusive nonleptonic $b\rightarrow c\bar u d$ decays Open
In this paper we compute the NLO QCD corrections for the inclusive nonleptonic decay rates of $B$-hadrons at subleading power of the heavy quark expansion. In particular, we discuss the coefficient of the chromomagnetic moment parameter $μ…
View article: Quark-Hadron Duality Violations and Higher-Order $1/m_b$ Corrections in Inclusive Semileptonic $B$ Decays
Quark-Hadron Duality Violations and Higher-Order $1/m_b$ Corrections in Inclusive Semileptonic $B$ Decays Open
The theoretical description and data for inclusive semileptonic $B$ decays have reached incredible precision. This motivated us to re-animate the discussion of possible Quark-Hadron Duality violations. There seems that there is currently n…
View article: Inclusive semileptonic $$ b\to c\ell \overline{\nu} $$ decays to order $$ 1/{m}_b^5 $$
Inclusive semileptonic $$ b\to c\ell \overline{\nu} $$ decays to order $$ 1/{m}_b^5 $$ Open
A bstract Inclusive semileptonic $$ B\to {X}_c\ell \overline{\nu} $$ decays can be described in the Heavy Quark Expansion (HQE) and allow for a precision determination of the CKM element | V cb |. We calculate the terms of $$ 1/{…
View article: Introduction to B physics
Introduction to B physics Open
This article represents a short introduction on why the physics of bottom-quark hadrons is currently one of most important topics in contemporary particle physics. We introduce the main theoretical tools to set the stage for the following,…
View article: $$ B\to {D}_0^{\ast } $$ and $$ {B}_s\to {D}_{s0}^{\ast } $$ form factors from QCD light-cone sum rules
$$ B\to {D}_0^{\ast } $$ and $$ {B}_s\to {D}_{s0}^{\ast } $$ form factors from QCD light-cone sum rules Open
A bstract We present the first application of QCD light-cone sum rules (LCSRs) with B ( s ) -meson distribution amplitudes to the $$ {B}_{(s)}\to {D}_{(s)0}^{\ast } $$ form factors, where $$ {D}_{(s)0}^{\ast } $$ is a …
View article: Inclusive Semileptonic $b \to c \ell \barν$ Decays to Order $1/m_b^5$
Inclusive Semileptonic $b \to c \ell \barν$ Decays to Order $1/m_b^5$ Open
Inclusive semileptonic $B\to X_c \ell\barν$ decays can be described in the Heavy Quark Expansion (HQE) and allow for a precision determination of the CKM element $|V_{cb}|$. We calculate the terms of $1/m_b^5$ and derive a ``trace formula'…
View article: $B\to D_0^*$ and $B_s\to D_{s0}^*$ form factors from QCD light-cone sum rules
$B\to D_0^*$ and $B_s\to D_{s0}^*$ form factors from QCD light-cone sum rules Open
We present the first application of QCD light-cone sum rules (LCSRs) with $B_{(s)}$-meson distribution amplitudes to the $B_{(s)}\!\to\! D_{(s)0}^*$ form factors, where $D_{(s)0}^*$ is a charmed scalar meson. We consider two scenarios for …
View article: Alternative treatment of the quark mass in the heavy quark expansion
Alternative treatment of the quark mass in the heavy quark expansion Open
A bstract The treatment of the quark mass plays an important role when it comes to increasing the precision of the predictions of the heavy quark expansion for inclusive heavy hadron decays. Various short-distance mass schemes have been in…
View article: Heavy-quark expansion for lifetimes: Toward the QCD corrections to power suppressed terms
Heavy-quark expansion for lifetimes: Toward the QCD corrections to power suppressed terms Open
We consider the heavy-quark expansion for the nonleptonic decay rates of heavy hadrons, and compute the next-to-leading-order QCD corrections to power terms up to order 1/mQ2. We neglect the masses of the final-state quarks, so the applica…
View article: The heavy quark expansion for lifetimes: Towards the QCD corrections to power suppressed terms
The heavy quark expansion for lifetimes: Towards the QCD corrections to power suppressed terms Open
We consider the Heavy Quark Expansion (HQE) for the nonleptonic decay rates of heavy hadrons, and compute the NLO QCD corrections to power terms up to order $1/m_Q^2$. We neglect the masses of the final-state quarks, so the application of …
View article: Alternative Treatment of the Quark Mass in the Heavy Quark Expansion
Alternative Treatment of the Quark Mass in the Heavy Quark Expansion Open
The treatment of the quark mass plays an important role when it comes to increasing the precision of the predictions of the heavy quark expansion for inclusive heavy hadron decays. Various short-distance mass schemes have been invented to …
View article: New Sum Rules for the $B_c \to J/ψ$ Form Factors
New Sum Rules for the $B_c \to J/ψ$ Form Factors Open
We derive new sum rules for the form factors of the $B_c\to J/ψ\, \ell \barν_\ell$ semileptonic transitions, employing the vacuum-to-$B_c$ correlation function of the $J/ψ$-interpolating and $b\to c$ weak currents. In the heavy quark limit…
View article: B → D1(2420) and B → $$ {\mathrm{D}}_1^{\prime } $$(2430) form factors from QCD light-cone sum rules
B → D1(2420) and B → $$ {\mathrm{D}}_1^{\prime } $$(2430) form factors from QCD light-cone sum rules Open
A bstract We perform the first calculation of form factors in the semileptonic decays B → D 1 (2420) ℓν ℓ and B → $$ {D}_1^{\prime } $$ (2430) ℓν ℓ using QCD light-cone sum rules (LCSRs) with B -meson distribution amplitudes. In this …
View article: Heavy Quark Expansion for Heavy Hadron Lifetimes: Completing the\n $1/m_b^3$ Corrections
Heavy Quark Expansion for Heavy Hadron Lifetimes: Completing the\n $1/m_b^3$ Corrections Open
We complete the calculation of the contributions from the dimension six\noperators in the heavy quark expansion for the total lifetime of heavy hadrons.\nWe give the expressions for the Wilson coefficients of the Darwin term $\\rho_D$\nand…
View article: Hadronic contributions to the muon anomalous moment
Hadronic contributions to the muon anomalous moment Open
We discuss the hadronic contributions to the muon anomalous magnetic moment. They are dominated by light quark contributions which are constrained by the mechanism of chiral symmetry breaking. Using the leading order result based on $e^+ e…
View article: Chiral condensates in massless QCD and the $U(1)_A$ boson mass
Chiral condensates in massless QCD and the $U(1)_A$ boson mass Open
The $U(1)_A$ boson mass is calculated through the phenomenological characteristics of the vacuum related to spontaneous breaking of chiral symmetry in QCD. The mass is determined by the mixed quark-gluon condensate $\langle \bar q G q \ran…
View article: Linking lepton number violation with $B$ anomalies
Linking lepton number violation with $B$ anomalies Open
Hints of violation of lepton flavor universality in semileptonic $B$ decays have prompted a renewed interest in leptoquarks at the low TeV scale. Among the different scenarios suggested, some happen to violate also lepton number, yet not m…
View article: Nonleptonic lambda(sub)b Decays at Colliders
Nonleptonic lambda(sub)b Decays at Colliders Open
We discuss nonleptonic two-body decays of lambda(sub)b baryons, which may be studied in the near future at colliders.